^ I would say no. He never seemed defensive or possessive enough when Superman was around and he never made any snide remarks about Superman to Lois.
Let's face it, much as I like that movie, it wasn't really all that subtle (eg all the Christ imagery) being laid on with a trowel. I think that if it had been intended that we know Richard knows, there would have been a conversation or dialogue to that effect. Possibly after Lois whispered in Supes' ear in the hospital - she goes out to Richard who says 'Did you tell him?' 'Yes', says Lois. Cut to Richard looking worried but nodding acceptingly. Something like that.