[Samba] primary group

[vishesh]

dear all
 
  I am using winbind to get ADz user on samba. The problem i facing is 
related with group.
To clear the problem i am taking an example
 There is a AD user that belong to "Domain users" and "Marketting" 
Group, the new file/folder created by that user has group ownership 
"Domain users" but i want that "Marketting" should be group owner. Is it 
possible without setting SGID bit?
is there any short of primary group feature in AD.