If you want to assign an application to one of your colleagues, you can do this very easily from the application page. There are 2 ways of doing this.
Option 1: From the application header
You can quickly change the owner of an application by switching the name directly from the header.
Option 2: From the application settings page
Go to your application dashboard
Select the application you want
From the sidebar menu, click on More Options>general
Assign this application to someone else from your team
What happens when you switch owners
The application will now show in your teammate application dashboard
They will receive activity notifications related to this application