Users on the multiple APs

Hello,    Does anyone know that how to configure the wifi chillispot users by each NAS? For example : There are "testuser" wifi chillispot user and three Wifi zones which are AP1, AP2 and AP3. That AP{1-2} are nas-identifier. AP1 has 10.10.10.1, AP2 has 10.10.10.2 and AP3 has 10.10.10.3 ip address. That "testuser" must be available for AP1 and AP2 wifi zones. But, that user must be unavailable for AP3 wifi zone. How will do it?