🚀 go-pugleaf

>	2)	If A logs in to YY from XX and uses his
>		program, does this give the XX admin the
>		right to act as he did?

Without knowing the context of how A was told not to run the
program its hard to say but remember if A is using XX facilites
(eg terminal and processor (rlogin or whatever)) 
and presumably xx premises.  Also good chance A is using 
xx printers and disk space in gathering output (when no one is
around?). The question also refers to "his program". Is this
some extra-curricular activity A is involved with?
Perhaps a commercial enterprise using university computers?

Who knows, the point I would like to make however is that when someone
with the appropriate authority tells A not to chop down 
the apple tree with an axe and then A goes ahead and cuts it down
with a saw instead then in general A is not in any position to 
claim he has been wronged! (unless of course you are an ex WA
gov politician |-) )

As for the admin's actions it probably would have been better
to do what someone else suggested, ie the cut off A's access to
system xx and assess the situation again.
As for A, if YY indeed had no objections to your activities then
the real smart thing to do would have been to log onto YY directly.
After all why wave a red flag at a bull?
doug@psy.uwa.oz.au