Yes but if “Your State” wants a candidate named Bob Smith or even named Republican Bob Smith, and “Other State” wishes to vote for that person, then private RNC in “Any State” cannot interfere.
That is tampering with a Federal Election, very well defined in the US Constitution. It matters not when, where, private or public.
Limiting other States’ access to that person is a crime.
It is done through a criminal Monopoly, which I won’t explain.
Again, this is NOT an election. It is a nomination for a party. If there are other candidates that wish to run, either as a party candidate or as an independent, they may do so, subject to the Constitution and laws of that state.
Getting together and selecting a candidate for a party is not tampering with an election.