limit ftp users to homedir

["IS" <is think nl>]

I want to restrict all ftp users to their own homedirectory. In this case
the ftpd should use internal ls. In default every ftp user (except
anonymous) can browse everywhere on the server.

I use RH 7.1 and WU-FTPD. How can I get this work?

Regards,
Ivo