No, it is not currently possible.
This is something that has been requested by others customers and that could be considered for a future release, but it is not in our road map yet, because there are challenges related to the nature of the distance.
One thing that is tricky about distance is that it cannot be seen as a property associated to a game object. The fact is that the distance is per listener. Since it is possible in Wwise to have multiple listeners, there could be multiple distances (one per listener, per game object). The attenuations are working because they are already based on a per listener basis.
If a switch container was controlled by distance, it could be in a different switch for each listener, and this is not something that is supported at this moment.
