In short terms we do not yet have plans to add simultaneous multiple objects editing as integrated feature . However in case there is a high demand from our clients , we are going to reconsider.
Meanwhile this may be achieved by implementing your own "proxy" object to stay between RadPropertyGrid and the multiple objects and carry the changes both ways.
the Telerik team
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Public Issue Tracking
system and vote to affect the priority of the items