I guess I am compelled to answer a question with another question:

Is there any reason that Jewish law would be different a Jew involved in some activity that the Torah disallows?  That is, the answer should be simple: laws of Yichud and Shomer Negiah are the same across the board.   Perhaps a few moments of contemplation would allow one to consider some reasons why this would be so, but even if such introspection does not yield any insight the conclusion (of Halachah being the same for all Jews) would remain the same.