If you use uBlock Origin, you could add cosmetic filters to do it.

Something like...

news.ycombinator.com##.athing:has(a[href*="twitter.com"])

news.ycombinator.com##.athing:has(a[href*="twitter.com"]) + tr

news.ycombinator.com##.athing:has(a[href*="x.com"])

news.ycombinator.com##.athing:has(a[href*="x.com"]) + tr