to what @Tavis_Gustafson said.
Totally 
The hardware is fully unlocked and you can run whatever you want on it. All you really need is to define the LED matrix pinout correctly and the hardware is yours.
So to summarize, currently if you want to do things fully over LAN, you would need to reflash with your own ESP32 firmware. In the future, the built-in firmware might also have some ability to receive data over the local network, but we’re not working on that as a feature currently.