private forum

Hello,

I just finished installing PunBB and so far I like it... one feature I haven?t been able to find is a feature that enables me to hide all the forum treads until a user is login into the system (I will be using this as a board management for a non profit). So what I want to know is if there is a option or a plug-in that will hide all the forum content until the user as login. I?m not looking for a private message plug-in. Dose it exist?

Thanks
Christian