How to restrict remote forwarding ports in SSH2?

Hi everybody,

I am running openssh-3.9p1 and openssh-4.3p2 on Linux.
When using local port forwarding, the client's access to the ports of the
host machine can be restricted to a single port using the following option
in the host's configuration:
  permitopen="dest_hostname:port"

When using remote port forwarding: Is there a way to restrict the client in
the number of remote forwarding ports? In other words: I want the client to
be restricted, so that he can only remote-forward "ssh
-R15555:localhost:15000" and no other port on the server except 15000.
Without such a restriction the client would be able to "redirect" arbitrary
host-ports to where ever he likes.

Regards
Alexander