类别访问修改

Hi,
I would like a scenario as:


CategoryA
CategoryB
CategoryC

UserA in GroupA

UserB in GroupB and in GroupC

I would like that
CategoryA
CategoryB
CategoryC

are visible for everyone, without to login

but I would like that
UserA can modify/upload subcategory of CategoryA and deletion file upload file from CategoryA and going down from Backend

UserB can modify/upload subcategory of CategoryB and CategoryC and删除文件上传文件来自类别和categoryc，从后端下降，

非常感谢
Mario