Not that I remember. I don't think Tseng pays any special attention to Cloud at all, other than as an AVALANCHE member/general nuisance.
I always thought Tseng to be a very organized man. Hard to imagine he'd forget Cloud as one of Hojo's experiments. Considering in the end he tries to help them escape.
Well, he did just escape from a lab and see his friend die. I'd be a bit annoyed with the world/other people, too.
But didn't he adopt Zack's memory meaning he erased this? And if not then at end of Crisis Core Cloud seems resolved to do something about Zacks death. He clearly takes on the burden of the Buster Sword. But at the start of FFVII he doesn't seem to be concered about anything but his damn money. It's just not a very clean transition of story or character.
Maybe Crisis Core could've added another chapter to explain Cloud's change in demeanor.