"John T" wrote in message
, you should know
better than to assume these two posts are from the same poster based on
nothing more than IP addresses. Surely someone in your line of work is
familiar with the concept of routers and gateways ( . . .)

. . . Whose IP address change rather infrequently. A couple of posts made
on the same day with the same IP address (notwithstanding the same general
content and writing style) can be a pretty good indicator the posts came
form the same person.

--
Jim Fisher