There doesn't seem to be an intra-dynasty way to communicate with other dynasty members other then leaving a comment on a story. If Iron Dragon and I had a game against each other on the schedule, there are only 2 ways to get to Iron Dragon: Leave a comment somewhere and hope he sees it or through the console. I can't directly message him via the website. In fact, there isn't even a way to see the names of the other dynasty member unless you read a story or filter out player control teams via filter in the schedule section.