No. But i can tell you if I was hired by a group, as is alleged, to perform services. Might not recall Joe Schmo, but I will recall if I designed his project.
I work with a large engineering firm. If a co-worker came and asked for advice on how to size a vent line I might not know I helped design a Gay bathhouse. Legal questions could be even more convoluted and may not point back to the client or cause. I would have to answer I do not recall if I helped design a gay bathhouse, but I am pretty sure I did not.