BuddyPress.org

I think that privatizing a bbforum in this case is easy..

I dont remember when but i read that wp function can be included in bb. So you can privatize forums easily,

add an action that makes the forums hidden (hid in english?) if the visitor is not logged in

add an switcher action that makes the forums hidden if the group is not public

create a function that checks if loggedin user is in the group.

I think privatization is simple. Burt’s idea is really useful, but more difficult that privatizing forums, but it can be done..

You’ve to see how bp-groups (not bp-forums) works with forums and studing how it integrates groups with forums and creating own function that do the same..