I wouldn't argue too much with the three listed above but might add one extra network for consideration.

An Integrators Network takes the ideas that have been raised in the community and helps pilot them through to delivery within the organisation. In this sense - applying everything that has come through the networks to deliver a tangible outcome.

One of the best ways especially within organisations to get support and longevity into a community in an enterprise is by delivering outcomes or at worst when applying what didn't work and sharing and applying that knowledge back to the network