A woman who alleges Groupon Inc. used her identity without her permission will have to go it alone in her lawsuit against the deal-of-the-day website, a federal judge held Monday. In a written opinion, U.S. District Judge Ronald A. Guzman denied Christine Dancel’s motion to certify a class in the suit she filed under the Illinois Right to Publicity Act. Guzman held Dancel’s proposed class and subclass did not meet all the requirements for certification set out in Federal Rule of Civil Procedure 23. Dancel alleges Groupon …