I am familiar with the Render Layers of 2.79 and how to use one object to occlude another, and separate shadows etc from the objects that cast them. I would not call that old system intuitive, but I could use it.
I haven't done much compositing in recent versions of Blender and I don't know how Collections translate into layers for compositing. The manual pages for the current 3.2 don't go into much detail when it comes to isolating lighting and object alpha and all that fun stuff.
This answer was helpful for separating Render Layers, but their lighting isn't getting shared. Collections are totally disconnected from each other.
To be specific, I am using Cycles and have objects that emit. Theyr're on their own Render Layer. Then I have the environment that gets lit by these objects on a separate layer. I want the environment and the lighting without the objects that are the source of that lighting. I don't want those objects to be in the way when I separately make adjustments to the background of the image.
How is this kind of compositing done in recent versions? Thanks.