[Dragonsys]

Originally Posted by Dragonsys

 OR FIND_IN_SET(usergroup.usergroupid, user.membergroupids)

But I think it might work best if this was a selectable option. Or maybe a var, like m=x
Where x is 1, 2 or 3 (1 for primary, 2 for secondary, or 3 for either/both)

I got this working.
1 = Secondary Group Membership only
2 = Primary or Secondary Group Membership
Default = Primary Group Membership only

You can see it in action here:
Default - http://forums.texas-fbody.org/showroster.php
1 - http://forums.texas-fbody.org/showroster.php?m=1
2 - http://forums.texas-fbody.org/showroster.php?m=2
With Group ID - http://forums.texas-fbody.org/showroster.php?m=1&id=12