MONTREAL Roman Doroniuk, formerly a senior executive with Alliance Communications, has been named president and chief operating officer of Vancouver-based Lions Gate Entertainment Corp., a new position at the company. Frank Giustra, the investment dealer who founded Lions Gate in September 1997, remains on board as chairman and CEO of the Canuck entertainment company. Doroniuk was chief financial officer at Alliance from 1995 to 1998. He left the Toronto-based company following the merger last summer of Alliance and Atlantis Communications that created Alliance Atlantis Communications. Most i...