Насколько я знаю, в рамках нынешнего ПО Windows это не решается. (могу ошибаться)
Если брать Linux, по посмотрите эту статью
Using iptables раздел
owner.
owner
owner
This module attempts to match various characteristics of the packet creator, for locally-generated packets. It is only valid in the OUTPUT chain, and even then some packets (such as ICMP ping responses) may have no owner, and hence never match.
--uid-owner userid
Matches if the packet was created by a process with the given effective (numerical) user id.
--gid-owner groupid
Matches if the packet was created by a process with the given effective (numerical) group id.
--pid-owner processid
Matches if the packet was created by a process with the given process id.
--sid-owner sessionid
Matches if the packet was created by a process in the given session group.
Возможно
Multilink спасет. А может и нет. Программу еще не скачивал, не разбирался.
