We are setting up a homework submission process for our members where each member is assigned a moderator. To submit the HW, the member will create a thread with one of the prefixes that contains the moderator they are assigned to. For example [Moderator Smith]This is my homework Then only that student and moderator Smith can participate in this thread. Other students and mods may see the threads listing but may not view it. Is this possible with the XF 1.1 prefix or anything currently available?