自定义多点触控手势（OS X）

Is it possible to create custom multi-touch gestures for OS X? I know you can now make up your own gestures through the System Preferences but my question is if it's possible for the gesture to perform an action that isn't listed in the possible Trackpad options in the OS default. For example, let's say I want to close an application by swiping with three fingers or something along those lines.Is it possible to create custom multi-touch ges