This is a critical feature. Please make a serious consideration. We used to use LogMeIn and as soon as the user connected we could tell if they had local admin or not. What is happening is since it's not clear, and most of our users have it, and we're also usually not on the phone to ask the user to cancel the UAC box, I am literally every single day forgetting to check for local admin by hitting CTR-ALT-DEL and waiting for the user to stop trying to enter their own password and then waiting for the dialogue to time out. If maybe it said "NO LOCAL ADMIN" at the top of the screen, or maybe if the border color changed, I wouldn't have daily issues with this.
Customer support service by UserEcho