Limit concurrent Connections

Hello,
I'm not sure that this Forum is the correct one...
We have a big WLAN infrastructure authenticated by NPS / Radius (on Windows 2008 R2).
We want to allow our Users to use private devices in a special WLAN. Here we use EAP PEAP with Username and Password.
We want to limit the devices. Only one privet device per User-Account.
Is this possible with Radius and / or Accounting?

Thanks for any Help
Robert