Multiple Forcefield Types Within a System?

I'm working on some reasearch that involves several different types of molecules, and I was wondering if it is possible to assign a different forcefield scheme to different parts of the same system when running Forcite calculations. I know that different forcefields such as COMPASS or Universal have different pros and cons depending on the molecule types.
Would it be possible to use, for example, COMPASS on some of the molecules and Universal on the others within the same system on order to get better results? If so, how?