Bill,
Perhaps you could clarify a couple of points. First, on what basis do you assume that the activities at which ACTA (or SOPA / PIPA, for that matter) are targeted are at play here? The reason I ask, is that in 1983, I was working in freight sales, and prepared a bid to provide freight services to a large client, including a detailed bid package. Since this was before the internet (and indeed early enough that PC's were rare), it was all hand typed, and hand delivered to the client a week in advance of the bid deadline. When time came to award the bid, the winning bid was identical to the one I had prepared (including some mis-usage of words), except that it was submitted by a competitor, and was a couple of cents per hundredweight lower than the bid I prepared.
If pressed for an opinion, I'd guess that what happened was not that your internet communication was intercepted (although it might have been), but more likely that the information was obtained after the council received the information, whether with the aid and assistance of a someone affiliated with the council, or through some other means.
As I read the matter, nothing in ACTA would prevent a recurrence of the incident you relate.
ns
there's just not enough information here to know for certain that this