If a session is being held open by a program after the vWorkspace published application has closed you can use the Session Auto-Logoff to force that program/process to close.
Automatically logs off user sessions.
This policy is for users that start published applications and not full desktops. If enabled, vWorkspace automatically logs off when the last published application is closed. This eliminates the potential issue of applications remaining in memory, and never really terminating.
On the Session Auto-Logoff window, enter processes that if found to be running after the user closes all published applications, results in an automatic user session log off.