Sharman Networks claimed that it can't be sued in the U.S., because company is headquartered in Australia, registered in small island of Tuvalu and runs all of its servers outside U.S. However, the judge decided that since many of the Kazaa's users are Americans and that most of the movie studios and record labels who are sueing it are American, it can be sued in the U.S.
Now, because of this decision, Sharman Networks' case will be bundled with the other FastTrack companies' cases. In so-called "FastTrack case", the movie and music industries (MPAA and RIAA) have sued three software companies who distribute P2P clients that connect with FastTrack P2P network; Sharman Networks, Streamcast (which owns Morpheus that used to use FastTrack network, but doesn't use it anymore) and Grokster.
Source: News.com