Taxonomy access semi-compatible with category
The categoryi module has just been tested with the popular taxonomy access control (TAC) module, and the results are mixed. Access to assigned nodeis is controlled correctly through TAC, but creating new assigned nodes and viewing node listings is not being controlled at all. This behaviour should prove adequate for many situations, but obviously is not adequate for everything.
I am working on a module to provide full compatibility between TAC and category, for situations where restricting access to assigned nodes is not enough, and where users require a restriction of access to actual categories and containeris, and to creating new nodes assigned to certain categories. In the meantime, feel free to make use of the functionality that works now (and what works now is the key functionality of assigned-node access control).
No
No, there is no access control built in to categoryi. Category has a module called cac_lite included with it, but this is not powerful enough for many people's needs. Taxonomy access is the recommended access module to be used in conjunction with category, and there will definitely be more work happening in the future, to improve its compatibility with category. Category also works with most other node access modules.