I don't think so. In Max5 it was stereo only. I quickly checked Max6 and it doesn't seem to have changed.
The method for having multichannel audio next to a linked movie file is to play the multichannel file with an sfplay~ and the video through an jit.qt.movie instance. You can then link the both via 'seek' messages or controlling the speed of the audio file in relation to the timecode of the movie (=realtime sync)