Creating access groups

[user4]

Is there a way to create permission based on access group.

That is, only one group of users can access certain set of data.

Currently it seems, either all can access full data, or at most limited to data they created.

And what if it is required that few users work on same data, while not visible to any other users.

[roblaus]

This is a Pro feature. There are some projects on Sugarforge for CE. Look for teams