caid602, no, I don't think so.
iGuidance 4 is aware of one-way streets, and it does route correctly, but it just doesn't display any arrows on the map to indicate the direction of one-way roads. I never missed this much myself, but I think this could be a useful feature to have. Perhaps you could send a quick e-mail to iNav to suggest this as a possible future feature to consider adding.
