Coman was first capped for Romania during the 1985-1987 FIRA Trophy, during the match against Spain in Madrid, on 16 December 1984. He was also called up for the Romania team at the 1987 Rugby World Cup, however, he did not play any match due to Mircea Paraschiv being the starter scrum-half during the tournament. Although he was not called up for the 1991 Rugby World Cup squad, he still played for Romania, with his last international cap being during the match against France on 28 May 1992 in Le Havre.[2]