Each event case has terminals on the left side which return the event data. When you configure multiple events for a single case, the available terminals are only the terminals which are common to all the configured events. If you are only using value change events, you should have a CtlRef terminal, which will return a reference to the control which triggered the event. If you build the references of your controls into an array and search that array for the reference, you know which control triggered the event. Not the cleanest code, but it works.
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