Few things I need - permissions

[bobo00]

I'd like to know if vBulletin or some modifications allow the following:

• Preventing an usergroup (or alternatively users with less than X posts) from posting in threads that have more than Y posts.
• Preventing guests/usergroup (or alternatively users with less than X posts) from viewing links, but being able to view images (i.e. they can view thumbnails, but not the linked full images)
  I know this is partially done by VSa - Advanced Permissions Based on Post Count, but it hides both links and images, without a way to separate them.
  
• Setting a time limit after which user can no longer edit/delete his own post.