Product Selection on Reports

Is there a way to have the selection display only items from a certain product family and business segment when running reports?   We have two users who we want to only see one product category and one business segment when they open the selection on the product filter.   right now ITM data type is displayed in the report dictionary which shows all active products for all categories.  I'm not sure this is possible but if anyone has an idea wouldbe appreciated.  we are at V11.  Should mention that I have roles configured on user account but the selection still displays all records.  

thanks

Christine