Is there any way to specify number of test suite run concurrently?

I know we have option to run test suite in parallel by selecting parallel execution mode in collection of suites . I want to execute more than 2 test suite concurrently depend on my system resource.
Is there any way to specify number of test suite run concurrently?
Any help would be appreciated

Thanks
Ashwin

You can do it in version 5.10.1:

Thanks for quick reply…!!!