The %MacUUID% token returns a unique ID for this Mac. You can test this with Macro Syncing to have your macro behave differently on different Macs.
For example, use the Set Clipboard to Text action to copy the value of the %MacUUID% token on a specific Mac.
Just “Try” the action to copy it, no need to create a macro, then you can delete the action.
Then paste that in to an If Then Else action with a Text condition.