Not at the moment I'm afraid. Hopefully in a future release, but not in the short-term.
2.5 years into the future here...R25...still no Arnold Volume preview in the Viewport. Hopefully....one day. Will continue to use PV/RR/IRR/IPR.....Transmission over and out....
Transmission received... Correct... Still no Arnold Volume preview...
If you use the native Volume Loader though, it has a viewport integration and it translates to an Arnold volume. You might have to scale up density by 100 in the standard_volume shader, because the volume is scaled down in Arnold to match C4D.