You arent lost. You have it right too. With Carrara's new selective light list you can do it. Still, it is much easier to do with a switch at the light level. You still have the option to do it at shader level, which I do quite often anyway. But the example I mentioned above is a reason that I like it. Simple and quick.

Quote - Lost me I guess?  As I see it in Carrara you can have this Carrara two part specularity assigned to one object and have one specified light only lighting the "specularity" of that object?

The rest of the objects relating to other lights as per each objects particular settings?

Sorry if I am not with you--it's new learning for me.