Colman Domingo could have been like one of the characters he played in ”Passing Strange,” Mr. Franklin – a gentleman who keeps part of himself in shadow in order to spare himself pain and conform to the world’s expectations. Instead, spurred on by a love-filled upbringing in West Philadelphia, he has chosen to live fully as himself, exploring – and expressing – all the multifaceted reality of his own identity, not to mention those who shaped him and the people he encounters in the world. He tackles all of those all by himself in his solo play ”A Boy and His Soul.” Now Domingo, who has won critical acclaim for his ability to portray a wide variety of fully-fleshed-out characters, is bringing his autobiographical play to the city that shaped him.