[otrs] grouping Customer users

[Forms]

Hi All,
 
Is there a way to group customer users as follows?
 
Company
  Manager
     Domestic
       Customer-101
       Customer-102
       Customer-103
       etc
     International
       Customer-201
       Customer-202
       Customer-203
       etc
 
Rules:
  Customer user Manager can see all tickets created by all
  Customer user Domestic can se only tickets created by Customer-101, 102,
103 and etc
  Customer user International can se only tickets created by Customer-201,
202, 203 and etc
 

Carlos,
México
 
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