TWA - View test plans from a different project

TFS 2013 Update 4 introduced the 'Test' tab into Team Web Access.

Is it possible to view Test Plan from different Projects or Team Rooms in this view. For example, in a work item query you can specify @Project.

The reason I ask is that we have a single dashboard that brings data from multiple projects. This works for PBI's, Tasks and Bugs, but not test cases. The alternate approach we had is to have a Team Room within the project for an alternate governance dashboard, but again we can't see the test plan from the base project.

Any ideas appreciated.

Thanks,
Matt