Assigning Application role to groups

This is done in enterprise manager.

Click on Application Roles.

Note:
Here we are adding a group testgroup1 in the application role BI Author.
Click the role BI Author.

We have added the group testgroup1 to the application role BI Author by clicking on the Add Group button.
As we can see the groups BI Authors and testgroup1 is now given all the permissions of the application role BI Author.
Also the application role BI Administrator is given all the permissions of application role BI Author.