Authorize with SQL and not authenticate

[Tom Yard]

Hi people,

I've just have a default file with a LDAP + SQL queries for user
authorization, and NTLM for user authentication.

Also I want to just authorize hosts sending its MAC Addresses as its
usernames according to a SQL query matching a Mac Address table, but I
don't want to authenticate them because the Active Directory doesn't
contain MAC Addresses as usernames.

Is it possible just authorize with Freeradius and so let hosts to access
the LAN network ?

Thanks a lot!!!