A young man whose employer had brought him to Amagansett to work for the season was charged with driving while intoxicated on Sunday evening and, on Monday, with false personation, for giving a fake name to police officers. Walter Joaquin Victoriano, 20, a Mexican citizen who first identified himself as DeJesus Victoriano, told East Hampton Town police his real name after his arraignment, while he was waiting to be taken to jail in Riverside if bail were not posted.