Answer for How to tell where a wi fi signal is coming from?

This isn’t a question with a clear-cut answer. If you can’t tell the name of the network from the access point itself, you might be able to guess by which network has the strongest signal. But otherwise, there’s not really a simple way to find out.
Regarding knowing where a wi-fi signal is coming from, without specialized equipment it’s not easy to tell. Once again, about the only way to approximately guess is to walk around and check signal strength. Sort of like the game of hot and cold. The stronger the signal the closer you are to the source. There are softwares available like WiFi Explorer for Mac and Acrylic WiFi for Windows that can help with signal strength measuring. Good luck!