Identificar activacion

hola necesito ayuda o info para saber si hay manera de saber mediante la app blynjk quien activa o dasactiva un comando en la app , esto seria para poder identificar que celu lo activa para ser mas claro , lo tengo con modulo esp8266 soy muy amateur y espero alguien me pueda orientar gracias!!!

There is NO option for that AFAIK

It seems Blynk Server tracks all App connections based on account used in the App and the AUTH codes for the MCU devices, not the device(s) running the App.

ALL phones(etc) running App and using same account info are as identical clones of each other, each sees and controls as if they are one device)… But it has been asked about many times, so try searching this forum for further info.