Freeradius 2.2.5 Access by SSID

[Alejandro Cabrera Obed]

Dear, I have a Debian server with Freeradius 2.2.5+dfsg-0.2, authenticating
against an Active Directory server. I use PEAP / MSCHAPv2 and NTLM
authentication.

I have no MySQL server installed, all my config is in /etc/freeradius/*
files.

Everything work OK at the moment, but now I need to authenticate users by
different SSID's, as below:

SSID1 --> User-A and User-B
SSID2 --> User-C and User-D

Is this implementation possible in my current scenario? In the affirmartive
case, what is the best way to do that?

Thanks in advance!!!

Alejandro