multiple group membership & processing

greetings, I have users that should only be able to use 2 of 10 APs(chillispot nas). I found that when I create the following, the user can only login to the desired AP. Radcheck table fred User-Password := mypass radgroupcheck table cust1 Called-Station-ID == 00-13-10-94-AF-3C usergroup fred cust1 1 This works great, however, how do I expand this so that fred's login works for two Called-Station-IDs? Do I create another group with a different priority? Can't seem to get both groups to work as a logical OR. Thanks