If you mean a directory of Lojbanists who are willing to host other Lojbanists in their homes for free (going by Wikipedia's definition of "Pasporta Servo"), no, there is not, and in all honesty, the idea sounds creepy.
Why does it sound creepy? There are quite some hospitality services even without any link to a particluar language at all (like those listed at http://en.wikipedia.org/wiki/Category:Hospitality_services )
mu'omi'e .kamymecraijun.