Termitate previous workflow

Is it possible to terminate a workflow when running a new workflow.

For example, I have a workflow that captures a geometry and then performs a QueryTask on that geometry to present the user with the attributes of a building before performing an inspection. If the user captures a geometry the first time around, everything works fine, but if the user starts a new inspection without capturing a geometry the first time they get a query task error and then the inspection form comes up.

I'm pretty sure the problem is because the geometry wasn't captured the first time and the workflow is still running when the second workflow is started. It would be nice to be able to cancel all running workflows when you start a new one.

Pablo