Yes! But perhaps not the way you expect. Here’s a number of techniques: Specifying Interaction with Mockups.
Here’s why we’re not adding any more features to support interaction for the time being: Why We Aren’t Doing Deep Interaction in Mockups.
You might also be interested in How to choose a wireframing / prototyping tool. Is Balsamiq Mockups the right tool for me? or the Mockups product page, which touches on this subject as well.