A Denver judge has thrown out a lawsuit that state regulators filed against an investment broker and signaled she will do the same to their case against an Indian restaurant. In a setback for the agency, Judge Sarah Wallace determined the Colorado Division of Securities can sue only people and companies who committed investment fraud within the past five years, rejecting the division’s argument that it is immune from statutes of limitations. In mid-April, the Division of Securities sued the securities broker Michael Bissonnette as well as Bombay Group, which operates Saucy Bombay on East Colfax Avenue.