With the events we can track which chunks belong to which segmented_unit. However it's not possible to keep track of these chunks when other mods change the territories using one of the functions, without continuously checking the territories.
Request is to add a on_territory_changed event which is raised when clear_territory_for_chunks() or set_territory_for_chunks() is called.
Ideally the event is also raised when new segmented units are added to/removed from the territory (when writing to LuaSegmentedUnit.territory for example), so we know when territories become occupied/vacant.
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The documentation also mentions in set_territory_for_chunks:
It is your responsibility to update the patrol path if needed.
Which is currently not possible if patrol path and territory management are handled by different mods.