I haven't done this for quite a while. You need to add an extra match in NPS to match the SSID. I think you need to match on "Called-Station-ID". Basically look in the event viewer to see what is being sent to you as well in the RADIUS request and add something for that. This article same some related info. https://social.technet.microsoft.com/Forums/windowsserver/en-US/fa662135-3ddd-4699-a8eb-83f9f85b5674/nps-calledstationid-regex-pattern?forum=winserverNAP
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