unable to play with myself

I own MC on windows 10, java, PE and Xbone, my friend on my network with MC for win10, starts a world with friends of friends as the multiplayer setting, i can join from my pc throught the friends list, but then my phone says, "you're not invited to play on this server" if i try and join from it as well.

The same goes if i join from phone it then tells me on my pc account that "you're not invited to play on this server".

I bought all different versions at different times, why am i not able to play .... 'with myself'?

i assume my lanned xbone, with the same xbl account will do the same, i just havent tried yet.

this is the reason i bought PE and the xbone versions of minecraft, because i have kids and they play on my xbox and i wanted to be able to join them from my computer.

Xroles.