The Kingdom Nation of the Father is not limited. It is a spiritual Kingdom Nation but its laws encompass the whole earth and it has dominion over all souls because these laws are for the salvation of man.
15 And the seventh angel sounded; and there were great voices in heaven, saying, The kingdoms of this world are become the kingdoms of our Lord, and of his Christ; and he shall reign for ever and ever.
The physical boundaries of the people of this world are only physical in nature, while the Kingdom Nation, including its laws are spiritual. These laws are laws of a higher world and it will affect all aspects of man living here on earth.