In a related article linked at the bottom of the article's page, it says Meta confirmed it was a former data engineer:
https://torrentfreak.com/meta-confirms-data-engineer-is-behi...
https://torrentfreak.com/meta-confirms-data-engineer-is-behi...
Today's Torrentfreak article is about "an executive" and references the article you have linked thus:
This is not the first time a Reality Labs employee has surfaced in the case. Earlier this summer, Meta confirmed that a former data engineer at the division was behind a Comcast connection linked to 97 films.
Or not - still much is under the fog of reporting ongoing partial disclosures.