The TTP is not directly affiliated with the Afghan Taliban movement led by Mullah Omar, with both groups differing greatly in their histories, strategic goals and interests although
they both share a primarily Deobandi interpretation of Islam
Mullah Omar's movement is by and large consisting of ethnic Pashtuns of Afghanistan; some with direct tribal affiliations across the Durand Line.
TTP consists of Pashtuns but also foreign jeehadi elements (from Chechna/Dagestan, Morrocco, Egypt, Algeria, Saudi Arabia, Kuwait; even Uyghurs from China)....they have a global expansionist agenda whereas Afghan taleban (which calls itself Islamic Emirate Govt of Afghanistan) is purely an Afghan movement.
the 2 do have some merging interests and undoubtedly they do have ways to get in contact with eachother
definitely worth reading:
http://www.nytimes.com/2009/10/23/world/asia/23taliban.html?_r=0