What's PSET and how would you use it? I might have had a PSET in SYSUTILS once upon a time, but it gave way to @PSET. I can't figure out how you'd use it.
I suppose TCC could figure out if TCMD is its parent, and, if so, use SYSUTILS's @PSTAT[] to look at TCMD's command line ... if it had "/D ..." make a log entry. But you'd be faced with the problems of multiple TCCs doing the same thing and of not logging those commands.