[Samba] Protect directory

[bimbospank at virgilio.it]

Hi all,
I have Samba 3.0.1 on my linuxbox

I have this problem:

my directory tree
 
 /home2/public
 /home2/public/user01
 /home2/public/user02

security = share

ok..all user on my network have access to home2/public/user01.
but only user01 can access to private section.

/home2/public/user01/private <--- Create a protected folder with password
access.

is it possible ?
how to do it ?