Seeing Local Network Address ?

[Tolerant 70]

When I take my laptop and leave home then try to connect using this app & emby connect my server choices only show the local IP address I use at home, ie. 192.168.1.2  

 

What's up with that? Even telling the server to report my true external IP doesn't seem to make a change.

 

If I connect manually I can connect however when playing some files they just close the app instead of playing, yet on my home system they play fine with or without the app.