Hmm - IIDs used to index in to the SOL, so you used to be able to say Self.X and Self.X, etc. But I changed it to not work in the SOL because there are other situations it doesn't work. I guess we need both, as well as UID indexing.
I would love if there was a way to reference objects in actions like HotGod described. The ability to associate the precise instances picked in the conditions with the actions is something I desire since I started using CC.
The work-arounds to achieve the same picking precision are far, far less intuitive than if such feature existed.