Restrict items for authors

Yes. In type parameters set default access for articles special. Also if you want articles not to be visible in the list, in section set parameters show restricted.

Thanks for your answer! My other question is that, how is it possiple to show one category for one user group. For example, users save dogs. The dogs lives in towns, the town is the category. Only the admin of the town should see the dogs of the towns (category). Is it enough to buy COBALT or we will need EMERALD too? Thanks in advance! Virag

And of course, the users should see their own dogs.

simonvirag And of course, the users should see their own dogs.

Only their own or others too? i mean shoud be there be one town and dogs of different users in it?

I think you can make town a Cobalt field for Dog type. Then it is easy to filter and see all the dogs in town. it is sometimes much more flexible to use field as category instead of category.

The simple users can see their own dogs, and every admin can see only the dogs of his/her town. There are several towns. Is it possible to solve it with a field? Or I need emerald or a special field for it?

You do not need Emerld for that. I think you can do this with a field.

Also you can do this with user persobal categories, which parameters you can find in section personalization. Every user will be able to create personal set of categories.

But in this case it will be never possible to see all dogs of all users in the same town.

Thank you very much!