Does the homey team have grouping in development?

I do understand the question. It would be an awesome feature. I imagine that one could say in a rule:

IF any dimmer IN zone IS changed SET dimlevel TO 100% FOR label.

So an app could listen to all events in a zone with kind “dimmer” and provide a label to execute the action. The label would contain the dimmer in question.

But wat is causing the change of the dimmer? Is it caused because some one pushed a button? Or is it set in another flow?
So when a flow changes a dimmer to 10%, then this rule comes in and changes it to 100% ? Is that the idea?

It was just an example. But yes, in this case it you would change the dimmer, either in the homey app or physically, it would see that event. It would know which dimmer by label. And therefore take the correct action on the dimmer with this label.