DOCSIS 3.0 and Multicast

To Those Who Do DOCSIS3.0, I can't seem to find a simple answer to this, possibly because it is self evident to those actually using Multicast over DOCSIS. Which we are not currently. Multicast over DOCSIS 3.0, to 3.0 CM, can the CM share the same media stream on their node? In example, 2 Cable Modems in the same node (no splitting, same US/DS channels/ports, CMTS..), each have a customer watching ESPN. Is there one or two media streams worth of content on the plant, channels, node? We now how this operates in other worlds, GPON, xDSL and AE. Just haven't seen it specifically mentioned out right in DOCSIS literature. Thanks for any direction you have.