Jailed/Chrooted Shell is already there in todo list as well as a preview. It would be great to have this as an addon for testing until it is ready for the stable build. I recently had a situation where this would have been useful. I host few of my friend's low traffic sites for free on my server. One of the site was not kept updated and got hacked. Through it, it was possible to have access to all the sites on the server. Say, for example, if I add a file manager script on one of the vhost, it is able to access everything site on the server. Is there any way to fix this security issue?