user authentication

[Goly Shakarov]

HI good people
I am running a samba server 2.0.5 under solaris 2.7 which askes some other
server for authenticating users.
Is there any possibility to define ONE user to not authenticate with the
password server? but may be locally with samba?
this is part of my smb.conf
TIA
# Global parameters
[global]
        workgroup = XXXX
        netbios name = AAA
        security = SERVER
        encrypt passwords = Yes
        password server = the.password.server


בברכה.
גולי.
תלם.