When i'm using "hide unreadable = yes" the samba hide files can't
readable by user %U. OK.

I need show only folders when the primary group of the user %U can
read, for example

userdemo in sales group

drwxr-x--- 2 root sales 4096 2008-04-17 13:31 FOLDER_SALES

This folder with sambaconf "hide unreadable = yes" don't show but i
need show this folder to the userdemo because this user have a primary
group sales.

I hope I have expressed correctly

Thanks !