Allow regexps for tasks from the command line tool

From the command line, I'd like to be able to specify a regexp for which tasks I want to run. Currently, this is just available by using aliases in the UI project settings. While aliases are super useful for groups of tests that I want to repeatedly run, it doesn't leave a great way to run tests from the command line on a one-off basis. Sometimes I just want to run a particular set of our tasks and leave out the rest, but which set of tasks I want changes each time. 

I'm not sure if that's a big or small change on your end, but I would find it very helpful if possible!