is it possible to add customize filters in Reports tab for tempo Reports?

An alternative is to create a SAIL report for each application. Then when clicking on the "Application" the SAIL can give you a grid of reports (name, desc, link to see report). On click, the report can display (like a Table of contents with links). Just don't forget to add "back" links that go back to displaying the grid.
Hope that gives you an idea, if you really need a way to achieve this.

An alternative is to create a SAIL report for each application. Then when clicking on the "Application" the SAIL can give you a grid of reports (name, desc, link to see report). On click, the report can display (like a Table of contents with links). Just don't forget to add "back" links that go back to displaying the grid.
Hope that gives you an idea, if you really need a way to achieve this.