How? Different UI behavior based on used RayInteractor

I have "Best Select Interactor Group" with two "RayInteractors": one for Grip Button, one for Trigger Button. In UI (flat, but if it makes a difference, I could use curved) I want to be able to trigger OnClick event on standard buttons only with Trigger Button, but also in the "Scroll View" I want to scroll only with the Grip Button (no scrollbars). Is there any elegant solution please?