LK IHC is fully supported.

For direct control of Lutron GRX with Beo4, it has to be a BO compatible model (GBO instead of GRX); either a control unit or a keypad. With MLGateway, home automation commands will be received directly by the beolink products (BV7 in your case), relayed to MLGateway, who will in turn control the Lutron system via Ethernet/RS232.

MLGW01 shown above has been available for 2 years now and only for the US market. The recently released Masterlink Gateway is produced by Bang & Olufsen itself and is available worldwide. A completely different concept, with full integration of Beo5 and partner control systems.