I live in two different locations (a few days a week i live in my "work-town" and the rest of the time in another town). I also use two different devices at these two locations.
I just startet to play on this server and some people told me that i can get banned, if i use my master acount from two different devices and two different locations.

I just wanted to ask if that is a problem and if so, what does that mean? Am I only allowed to play this server from one of the two places I live?

I hope someone can help me

If you play only one master account you can play where you want ....