On the Flow Monitor ► Tabular tab ► "Details on" pop-up I would suggest amending the "Port" column label to read "Source Port" or "Remote Port".
It's usually obvious based on the context of the protocol being used but if someone doesn't use the Flow Monitor very often, doesn't have a great deal of networking expertise, or the protocol is unidentified or unfamiliar, it may not always be so obvious.
Regards,
edit: never mind. I suppose it does make perfect sense given that the origin is listed right next to the port and traffic can originate locally.
