Specific Threads for Registered Users

[Impromptu]

Hi all,

Is there a way or a Mod I can use where I can have:

(1) General threads where anyone can view the thread title and posts (current) &
(2) Special articles/registered users thread, where registered users can read the thread title and the posts, but unregistered users can only read the thread title but not the content/posts (needed)

I write special articles via the forum format and want to only allow registered users to be able to read it. I will also leave my current format of my general articles via the threads where anyone can read the content.

It is like being able to lock a selected thread and only for registered users to be able to read the contents/posts.

Thanks in advance!