change rootdirectory for sftp

From: Markus (
Date: 05/06/03

Date: 6 May 2003 05:19:48 -0700

can anyone help me?
If a external user gets an sftp-connection to my Server, he should
only get access to a special directory (for example in
/www/sftpuser_xy/). He should not be able to change to / .

How can I configure my Server for this requirement?
Is it possible to configure different "homes" for every user?

Thanks Markus