• click on Tools->Settings as follows:

• Enter your user password if prompted.

The Settings page will appear.

• Click on "Program Restrictions" to bring the screen below:

• Click Edit Restriction.

The Set Restriction page will appear.

• Enter the exe name of the programs you want to restrict running
  on client stations. You can use comma for multiple entry.
• Click OK.

Your entered programs to be restricted will be added to Program Restrictions list.

This feature is useful if you want to block internet applications when users login
on games rent type and when you want to disable some games when users login
on Internet rent type.