A federal judge gave a woman the go-ahead to intervene in a lawsuit her ex-husband filed accusing his former employer of interfering with his attempts to get a new job.In a written opinion last week, U.S. District Judge Robert M. Dow Jr. granted Jennifer Sawka’s request under Federal Rule of Civil Procedure 24(b) for permissive intervention in George Cavelle’s suit on grounds he filed the complaint before their divorce was settled and allegedly did not disclose it as part of their marital settlement agreement …