Complex sentence: Diaspora software development is managed by the Diaspora Foundation, which is part of the Free Software Support Network (FSSN), run by Eben Moglen and the Software Freedom Law Center.
Split into simpler sentences: Diaspora software development is managed by the Diaspora Foundation, which is part of the Free Software Support Network (FSSN). The FSSN is in turn run by Eben Moglen and the Software Freedom Law Center.