Which CP are you using? It looks like Plesk?
Are you the server owner or are you purchasing space?
Are you wanting the end user to get to their files like
http://www.domain.com/user_name_here?
If you are using plesk, I think it would be like this
http://www.domain.com/~user_name_here.
Its been years since I messed with plesk, but you might be able to symlink the directories if you have shell access.