[Samba] sambaSamAccount and posixAccount cohabitation

[Roman ZARAGOCI]

Hi all,

I'm new on this list and I'm french, so my english could be worst !;)

My question is about sambaSamAccount and posixAccount objectClasses.
I want the user "test" be mapped to user root (uid=0, gid=0) when logged 
into pam over ldap mechanism (such as ssh)
And I want the same user "test" be mapped to user test (uid=1003, 
gid=513) when logged to Samba server.

The user test looks like :

userPassword={SHA}...
sambaNTPassword=219AF2CFBB1146232E95BB289D4B4907
sambaPrimaryGroupSID=S-1-5-21-3332956327-150401671-1105301019-513
...*
gidNumber=513
uidNumber=1003*
uid=syvo
objectClass=top
objectClass=person
objectClass=organizationalPerson
objectClass=inetOrgPerson
objectClass=posixAccount
objectClass=sambaSamAccount
cn=syvo

Is it possible to map this user to root when it's logging to unix and 
map this same user to gid=513,uid=1003 when it's logging to samba ? 
Without making a second account...

Maybe the solution is on the smb.conf file; maybe I can force this user 
to be mapped to gid=513,uid=1003 when it logs to Samba ? or, on the 
opposite, maybe I can force user gid=513,uid=1003 to be mapped to root 
(gid=0,uid=0) when it logs to unix mechanism ?

I hope i'm on the right list for this question and I hope my english is 
sufficient to understand my query,

Thanks in advance :)