per-user permissions on forwarded port

[Rob Owens <rowens@ptd.net>]

I'm using ssh port forwarding to manage some remote machines.  Problem
is, I'm doing it from a multi-user machine and I don't want all users on
the machine to have access to the forwarded ports.  How can I prevent
this?

For instance, if I log into the remote machine with:

ssh -L 8080:localhost:80 remotemachine

That gives me access to remotemachine's private intranet (on my local
port 8080), but it also gives the other users of my machine the same
access.

-Rob