Invisible Thread

[Wifey]

I'm looking for something, sort of like the form hack, sort of not, and I swear I've seen it before but have ZERO idea how to search it.

I need something that will allow me to make a post, and set the thread to where you can't see the replies to said thread. You can reply to it, but the only people who can see the replies are moderators and admins.

Is this possible?

[Speysider]

I think you mean putting threads as a private forum.
This is a usergroup feature in vBulletin, no hack needed.