What I mean is: if you are a member of a particular forum the member.asp page will only show other members of that specific forum and not all members as it does now
you'd have to add a check to see for which forums that person is in the allowed members list. Then check for all other members who are allowed in those same forums, and display those.
It's possible, but when you don't use the allowed members list function for all forums, it'll still show all members.
I wouldn't do that in members.asp, since it would be too complicated to do it IMHO. It is possible to have a member that is a member to several private forums. What would you show then?
You need to think better about this and if you want some help, after thinking this thoroughly, post the in the MOD W/O code forum.