How assign permission to published apps

I trialing this Parallel RAS. I have setup with PA server, RDS server and Gateway server. The the published application works, however I can't find the option to publish application for group of users. For example, if I publish the icon for HR application I only want to give access to user/group. How can I achieve this?
Thanks
Arif

 

I think I found the option. It is under published application filtering tab.

 

I tried filtering option and it does not work.