Assigning by broken down categories

Assigning by broken down categories

I see there is a way to Assign a Group or Technician by the Category.  However, is there a way to Assign based on Sub Category or Item?  We have our Categories listed pretty generic, so the Sub Cat, and Item really should have the ability to allocate a group to.  


Also, is there a way to only have Certain Categories, Sub-Categories, and Items view-able by certain groups?

Thank you!


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