Different source NAS for Differnet privilege Level

I am using freeradius rev 1.1.0 I have everything running great I am using AAA authorization on different Network Devices, Cisco Routers, Cisco Switches, Foundry Switches, Juniper FW's. I have setup VSA's to respond to the user to set their privilege level upon successful authentication, then the authorization portion actually sets the privilege level I need to have different privilege levels based upon which NAS they are coming from, eg... Connecting while on the Corporate Network privilege level = 8, same user Connecting thru IPass out of the office privilege level = 5. Any assistance with this would be greatly appreciated. Thank you in advance for your help Jeff Stout CCT