File creation on Samba shares

[Danila Vologdin]

MAy be somebody knows how to
configure Samba shares in order to permit users
create files that belongs to the particular group but not to the
primary?
I have dir that should belong to the particular user group but files
they
create belong to the primary group ... (One user should use multiple
resources from different dirs)

Thanks in advance

Danila Vologdin