SPOILER
in part putting two and two together, really, but no nothing was explicitly stated, though it would be common knowledge about the new Assistant DA who would be working on the upcoming murder trial. That type of thing is in the news, and it would be known that Jeremy was involved in that case and therefore, knew her. It wouldn't be much guesswork, even if Lance were not in the know about who Jeremy dated, that he would have gone out with a woman lawyer he worked with.
Although... it might be more believable if it did get explicitly stated somewhere.