How to differentiate between the domain controller process from the slave host controllers process?

Issue

• Process entry tags of all three host controllers at the moment by default where it seems not possible to differentiate the domain controller from the ordinary slave host controllers:

Machine1:
-D[Process Controller] 
-D[Host Controller] 
-D[Server:server-1] 
-D[Server:server-2]

Machine2:
-D[Process Controller] 
-D[Host Controller] 
-D[Server:server-1] 
-D[Server:server-2] 

Machine3:
-D[Process Controller] 
-D[Host Controller] 
-D[Server:server-1] 
-D[Server:server-2]