[Samba] howto force file deletion with restricted permissions

[Peter Eser]

Hi,

I'm running recent samba with acls and ldap
(no force user or force group).
Now I have a problem with file deletion.
If a user A gives user B write permission on a directory 
and user B restricts the permission of his files in the directory of A 
(e.g. r--------, can be done via windows), then user A is not able to 
delete this files in his directory via Samba. Under linux the user
can use rm -f to delete anyway. 
Somebody know a solution for this?

man thanks,    Peter