Belarus, Russia introduce equal electoral rights for their citizens
eng.belta.by
The protocol provides for the possibility, on a reciprocal basis, for Belarusian and Russian citizens permanently residing in the territory of the other state to participate in local elections - to vote and be elected to local self-government bodies.

Other source : https://eng.belta.by/president/view/belarus-russia-introduce-equal-electoral-rights-for-their-citizens-166227-2025

You can be a permanent resident of multiple countries, but e.g. Canada will require you to have lived in Canada for 730 days in the last 5 years to keep your status of a permanent citizen.
To be registered as permanently living somewhere, you have to pay the local taxes, and prove that you have a residence there, as well as other proofs probably.
Seems like an interesting step to take.