While you can do a one-way, read-only sync of up to 3 views into a single table, that is one-way and read-only.
To edit fields in other bases, you would need to write your own custom JavaScript or use a no-code automation tool like Integromat.
Alternatively, you could solve your problem by doing it in reverse. Keep track of all your tasks in one master table, and then just sync specific views to the other bases where you can view “certain tasks only” in each base.