I think is possible though I am not an electrical engineer, you can have one LED on if the microphone has power(so you can't be tricked is off) you can have an

I think is possible though I am not an electrical engineer, you can have one LED on if the microphone has power(so you can't be tricked is off) you can have an LED for the networking device, but now considering that the microphone is always on it won't be as useful,