Radiusdesk dynamic client with ssid

I have succesfully set up a hotspot that connects with radiusdesk. Until now i have set an unique SSID that connects to the hotspot and everything works ok. I use the NAS-Identifier to make a dynamic ip NAS connection.
I have been asked to setup another SSID on the same NAS. Now the problem is that i have to make different vouchers to each SSID in a way than one voucher can only work on one SSID
As i use the NAS-Identifier to connect with radiusdesk and both hotspots are set in the same device, people can use vouchers in both SSIDS.
Could it be possible to use another value than the NAS-identifier such as the SSID name to make the difference in radiusdesk? i know that this can be done by using dynamic login pages but i would like to keep using mikrotiks hotspot rather tan dynamic login pages.

Sorry for my terrible english xD can anyone help me?
ty in advance!