Arduino voice input from multiple speakers


I have read about several projects on voice commands but all of them had single speaker, I need to build a voice recognition system to control an LED to turn ON/Off. The speaker will say on/off in the microphone. But the arduino should recognize voice from 4 different specified speaker, if command is given by other than those speaker the LED should not turn on/off.
I have searched about voice recognition module V3 to use with arduino. If anyone can guide me that would be really helpful.

Thanks in advance.

Best guide I can give you is to forget it. You are not going to get a recognition from four speakers and none from any other with any degree of accuracy. What are your expected figures for false positive and negitave matches?
I bet you have not even considered that.