Hi Michael,
That would be rather difficult to obtain, as the custom link name is initiated when the s.tl() function fires. Once it fires, generally that means they clicked on something and you're on your way to a different page.
If you're firing an s.tl() function without navigating away from the page, I suppose you could access the returned image request asset and search for the pev2 query string. That's how the DigitalPulse Debugger works; using similar logic wouldn't be a problem.
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