And for his next trick, monologuist Josh Lefkowitz will riff for 85 minutes on how hard it is to be a 26-year-old artist struggling to write a follow-up to his celebrated show from the 2006 Capital Fringe Festival, lest he be forced to, well, get a job. Also, he loves his girlfriend, but once he became a success — Heaven forfend! — other attractive women started hitting on him. Yep, it sure sounds like the…