I don't think Reality can do much to solve fireflies. Fireflies are a rendering artifact in Luxrender..

You'll need to let it render longer, sometimes scenes require thousands of Samples/pixel. I've had scenes render for 2 days before I was satisfied. :)

Software: OS X 10.8 - Poser Pro 2012 SR2 - Luxrender 1.0RC3 - Pose2Lux
Hardware: iMac - 3.06 GHz Core2Duo - 12 GB RAM - ATI Radeon HD 4670 - 256 MB