In Change/Work Order Application, there are a lots of status. To reduce the list you can filter it out by steps below.

1. Create Condition in Conditional Expression Manager Application with expression below
   

   :&USERNAME& in (SELECT USERID FROM GROUPUSER WHERE GROUPNAME = ‘MAXADMIN’)

   above condition is to allow only system admin can see it.

2. Select WOSTATUS domain in Domain Application.
3. Select Value you want to hide it. And Click View/Modify Condition
4. Fill the condition is step 1 and select the application you want to hide the status.

Thank this technote for guideline.