allow (bash) shell access for webusers

[Roosta21]

I am trying to allow web users to have access to their own bash shell,

Is there anyway of doing this?

i have found this article where web users can use sftp without ssh.

http://www.theoneandtheonly.com/category/plesk/

but i want to go onw step further and give them ssh access in a similar setup that domain names gets access