Well, thanks for your sugession.
My problem is that, I need to make a multiple virtual domains in one
machine and each virtual domain has multiple users. For this whole users
belongs to one virtual domain, they must be able to access a particular
user's( user in the same virtual domain) shared folder with different
access control. I think in this case I will not able to use the file
system based one.
please do correct me.
Correct. You need to use virtual accounts and virtual shared folders.