Can Sonar X2 show the same video clip on two different monitors at the same time? One for the acting talent to view the looped film clips to re-record their dialog, and another monitor for the engineer and director to view.

I'm assuming you know how to extend your desktop with a second monitor and know that you can move the video window onto another monitor by itself. Also, If you have a firewire video device you can directly output just the video on a monitor. As far as duplicating the monitor output, you could try using a video splitter.