People will always interpret it differently. You can at least nudge them in the direction you want to an extent by how you portray the person in your portrait. Elements like composition, pose, colour choice, expression, lighting would help in a way what you are trying to do.
Your goal is to show that he has to have to elements to himself, that which he must hide and that which he can share with the public? It would be hard to differentiate that from making him seem two-faced, in my opinion.