Using this tool to restrict users from seeing All People and Groups

Jan 27, 2009 at 8:27 PM
I was wondering if I can use this tool to restrict users from going to People and Groups and clicking All People to see all the users that have access to a site.  Or does anybody out there know of a good way to do this.  The reason I ask is that I am setting up a sharepoint site that is internet facing and I will have users from different company's logging into a common landing site.  And I don't want them to see the other users from different companies and their groups.

Please help