How to proxy only any type of requests

[IT Support]

Hi folks,

I a newbie freeradius user and I have a new problem. I have a switch
that send auth request to a FreeRadius. I need that if the auth
request if for a windows user (for example user NTCETEMMSA\guillem)
resend the request to a windows nps server, but, if the auth request
is a MAC address  (for example 00-24-54-3E-04-5A/NOPASSWORD), the FR
use the users file for auth this.

The problem is that the FR always auth only with users file or always
auth only with the windows nps server.

This is my proxy.conf server:

realm LOCAL {
}

realm NULL {
        type=LOCAL
        nostrip
}

realm DEFAULT {
        type = radius
        authhost        = 192.168.120.4
        accthost        = 192.168.120.4
        nostrip
        secret = J3q0fHat
}

And my users fils:

"00-24-54-3E-04-5A" Auth-Type := "Local", User-Password = "NOPASSWORD"
  tunnel-type = 13,
   tunnel-medium-type = 6,
   tunnel-private-group-ID = 910,
        Filter-Id = "Enterasys:version1:policy=Admon"


Anybody can help me please?

Thanks a lot for your help.

Toni