You can monitor this event log through the Custom Event Log monitoring feature of EventSentry.
Simply click the Custom Event Logs tab on an existing or new filter, select the DFS Replication from the list and check the check box next to it.
The selected event log will now also be monitored by this filter. To monitor this event log in other filters as well, simply follow the same procedure with the other filter, only this time you will only have to check the box since the event log will already be selected.