[Samba] Restrict access to printers

[Paul McAtasney]

I'm running samba 2.2.3a and want to add a printer so that it can only be
used by certain users (or groups of users). This is the entry in the
smb.conf file

[floor2]
        comment = Printer 2nd Floor
        path = /var/spool/samba
        printable = Yes
        use client driver = Yes
        valid users = @grp1
        write list = @grp1
        force group = grp1
        public = no

However, this doesn't appear to work. Can anyone enlighten me as to what's
wrong?

Thanks.