Professor...either an alias to a master device in each of the groups... or a group membership field in the device detailing where it should show up. Every group then becomes dynamic... although, you could potentially do that now by adding a property token and using dynamic groups to gather based on those tokens. Everything parents to your infrastructure group, but then per customer tokens could populate dynamic customer groups. I'm doing that for a few of our customers. The dashboards I build are generic and use tokens in the device / group filters. They are then cloned into a customer group that sets the token telling it what devices to display. The users are set to those groups. that way the dashboarding is simple for them to access and for me to deploy. Semi-relatedly, I'm trying to figure out how to use that same mechanism to make a "slicer" widget that would allow me to have a check list of servers on a dashboard, then dynamically adjust which are being shown in other widgets on that dashboard at any given time.
I've also entered a request for sub-dashboards so you could have an NOC dashboard that allows a user to click through to a performance dashboard for that particular device... but not actually the device itself.
