Moisevich was found by a disciplinary tribunal to be in breach of World Athletics’ Integrity Code of Conduct.
Tsimanouskaya refused to board a flight back home from Tokyo when she was removed from the Olympics against her will after publicly complaining about the decision by the national team's coaches to enter her in the 4x400 metres relay, which was not her customary distance.
She defected to Poland, saying she feared for her safety if she returned to Belarus.
World Athletics cleared her to compete for Poland after waiving the normal three-year waiting period for nationality changes.
Moisevich's actions were judged by the tribunal to be an abuse of power and while he was also found to have provided false or inaccurate information in the lead up to Tsimanouskaya's departure from the Olympic Village, the AIU said.
The former coach, who retired last May, "has been immediately barred from participation in any capacity in any aspect of athletics or any activity under the ambit of World Athletics or its Area Associations and Member Federations," it added.
Moisevich was charged after Tsimanouskaya's withdrawal was referred to the AIU by the International Olympic Committee (IOC) and World Athletics (WA) on September 30th, 2021.
"This ruling represents a significant success for the rights of athletes in the sport of athletics," AIU Chair David Howman said.
"The dignity of all athletes is of paramount importance and every attempt must be made to guarantee the environment in which they compete is free of harassment, abuse and bad faith dealings of any kind."
