This is not going to be as simple as using the Light Path Node, because the Ground is also reflective.
You’ll probably have to dive into Compositing if you want to do this in Blender.
Luckily CGCookie has recently released an excellent new Fundamentals of Compositing for blender 4.2 by Sean Kennedy (as well as 8 other updated Fundamentals Courses: CORE). Along with many other new Courses, so you might want to consider getting a Subscription, it is really worth it at the moment.
