I don’t see why the converter needs updating? It is already capable of filtering events.
I think the database needs to be updated for this device so that it filters the events. You need to add the correct notification type, and the correct event filter. So, I think type=BURGLAR, event=8 should work.
Additionally the channel type should be changed to alarm_motion instead of alarm_general.
The same sort of updates probably need to be done to the Z110 as well - even if it is working “well”. For starters the channel type is wrong - it should be sensor_door… Filters don’t really mater for the door sensor since it is handled a little differently in the converter.