[akz645]

Example:
AdminCP settings: http://i.imgur.com/51fEQ4Q.png
Users profile settings: http://i.imgur.com/SYRwzpt.png

This is what happens if you try and go beyond the restriction:
http://tinyurl.com/z57568k OR http://tinyurl.com/oj7pegs
Note: Once you're going to hit the limit, this is what appears: http://i.imgur.com/OucPmeE.png
Basically, you must refresh the page if you want to continue to the post.

Originally Posted by MarkFL

• New Threads And Posting In All Existing Threads - A user's posts in all threads in the subforum are counted. If this count is equal to or greater than the maximum allowed, then they will be prevented from posting new threads and replying to all existing threads.

• My test results:
• [2] posts at maximum. You can not do the following after the limit (for [2 mins]):
  A) Replying in existing threads created by yourself.
  B) Replying in existing threads created by others.
  C) Creating new threads. Note: Creating a thread, increases your post count by 1.
  D) Replying in new threads created by yourself.
  E) Replying in new threads created by others.

Originally Posted by MarkFL

• Posting In All Existing Threads Only - A user's posts in all threads in the subforum are counted. If this count is equal to or greater than the maximum allowed, then they will be prevented from replying to all existing threads, but may start new threads.

• My test results:
• [2] posts at maximum. You can not do the following after the limit (for [2 mins]):
  A) Replying in existing threads created by yourself.
  B) Replying in existing threads created by others.
  D) Replying in new threads created by yourself.
  E) Replying in new threads created by others.
  
  What you can do the following after the limit (for [2 mins]):
  C) Creating new threads. Note: Creating a thread, increases your post count by 1.

Originally Posted by MarkFL

• Posting In Threads Begun By Other Users Only - A user's posts in all threads they didn't start in the subforum are counted. If this count is equal to or greater than the maximum allowed, then they will be prevented from replying to all threads they didn't start, but may start new threads..

• My test results:
• [2] posts at maximum. You can not do the following after the limit (for [2 mins]):
  A) Replying in existing threads created by others.
  E) Replying in new threads created by others.
  
  What you can do the following after the limit (for [2 mins]):
  B) Replying in existing threads created by yourself.
  C) Creating new threads. Note: Creating a thread, increases your post count by 1.
  D) Replying in new threads created by yourself.

Originally Posted by MarkFL

• New Threads Only - A user's threads in the subforum are counted. If this count is equal to or greater than the maximum allowed, then they will be prevented from posting new threads but may reply to all existing threads.

• My test results:
• [2] posts at maximum. You can not do the following after the limit (for [2 mins]):
  C) Creating new threads. Note: Creating a thread, increases your post count by 1.
  
  What you can do the following after the limit (for [2 mins]):
  A) Replying in existing threads created by yourself.
  B) Replying in existing threads created by others.
  C) Replying in new threads created by yourself.
  E) Replying in new threads created by others.

@MarkFL
1)
What about not being able to do:
A) Replying in existing threads created by yourself.
B) Replying in existing threads created by others.

But still can do:
C) Creating new threads. Note: Creating a thread, increases your post count by 1.
D) Replying in new threads created by yourself.
E) Replying in new threads created by others.

2)
What about not being able to do:
C) Creating new threads. Note: Creating a thread, increases your post count by 1.
D) Replying in new threads created by yourself.
E) Replying in new threads created by others.

But still can do:
A) Replying in existing threads created by yourself.
B) Replying in existing threads created by others.

^ That's basically the two I was referring to in my question above.
Although now that I've formatted it this way, I realise there are far more variations that can be done than I initially expected.