An old post which explains that Open Home is a modified proprietary version of UPnP. It is not compatible with standard UPnP. There were no plans to support Open Home at the time and I think this has not changed.
Antoine Official Support account
Hello @Stouthart,
Audirvana is only compatible with UPnP/DLNA, OpenHome (which is by the way a “custom” UPnP/DLNA protocol) is not recognized by Audirvana. Dropping a feature like UPnP/DLNA is a big mistake as there is not a lot of software compatible with OpenHome. The fact that Auralic still have this information on the G1 page is kind of a lie to the user that would buy the G1 for its UPnP/DLNA feature.