[Samba] Samba controlling some auth stuff

[Bruno Gola]

 I have a samba 3 running on a linux box (debian 3.1 sarge) as a PDC. I dont
know if it's possible, but, i need that samba controls the authentication on
some windows machines, like i have a machine A,B and C, and all of them are
part of theont machine A and B, but not in C. And a user brunog that can
login on machine A and C, not in B. Is this possible with samba?

Thanks,

--
Bruno Fialho Marques Gola <brunogola at gmail.com>
Cel: (11) 9294-5883