The documentation of multiprocessing.Manager contains extensive examples for using a Manager and the various objects associated with the calss:
Managers provide a way to create data
which can be shared between different
processes. A manager object controls a
server process which manages shared
objects. Other processes can access
the shared objects by using proxies.
[and so on]
Manager objects allow you to create variables shared in multiple processes. What is it that you exactly want to achieve? Maybe a request for an example would help?