As-is, I don't think so.
In Export > Multitrack Mixdown, in advanced options you can output by mixdown (mono, stereo, 5.1), individual tracks, or by bus. Each is mixed down to a separate file.
If you set up a master bus for each of the 5.1 channels (and you can save a session as a template for future work), then you can mixdown via this option.
If your mix is more complicated, II would go to Menu > Multitrack > Mixdown to file, hit extract to mono once the file is in the bin, and then export those tracks.
Two extra steps, not terrible, but not 100% automated either.
Angelo Lorenzo
Fallen Empire Digital Production Services - Los Angeles
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