Bruce -
That’s exactly what I was hoping for. I wrote a custom service manager for my Hue lights that allows me to use groups and scenes ([UPDATED as of March 24, 2016] Hue Lights & Groups & Scenes (OH MY!)). My scene device types have a function that allows me to apply the scene to a group (instead of the whole house). I use RM’s custom command feature to do so. I have a scene for each mode (I have 11), so having custom commands per mode would greatly reduce the number of rules I use / overall complexity.
Thanks,
Tony