There is no other DARPA, so yes. However, that isn't something that should be viewed with suspicion. DARPA is primarily concerned with defense projects of course, but they have also worked with many civilian companies for non-military projects as well. Almost every technological advancement we have ever had was defense-based at first and only for the military. As for Sandboxie, I agree that the Tzuk going away is probably a death knell for the program.