I created a RoleUser class that can validate a user and check their user groups. It isn't the most robust but it might give you a headstart.

http://www.vbcity.com/forums/topic.a...1346&#RID64857

Here are some other posts on the subject:

http://www.vbforums.com/showthread.p...hreadid=248991

http://www.vbforums.com/showthread.p...hreadid=244755