In a recent game I played, after the round ended, there where several players who decided to repeatedly and rapidly spew racial epithets in voice chat. As I was trying to mute them, I realized that there is currently no why to identify who is speaking in voice comms. I've occasionally seen my own nameplate in the bottom left corner of the screen when I try to use voice comms when I am dead, flickering on and off, but that seems to be the only time any sort of identifier for a speaker has popped up.