I couldn't find this game. I wasn't trying to prove you wrong. I wanted to see when he did this. But based off his Home Run log at Baseball-reference, he didn't have a 2-homer game vs Philly.
To be fair, you said bombs, not necessarily HRs.
In any case, here are the 2 homer games of Jermaine Dye's career:
July 2, 1999: Two homers off Dwight Gooden
July 4, 1999: Two homers off Dave Burba
August 9, 1999: Two homers off Mark Portugal
September 14, 1999: One homer off Tim Belcher, one homer off Al Lavine
April 26, 2000: Two homers off Ryan Rupe
July 25, 2000: Two homers off Jim Parque
August 12, 2000: One homer off John Parrish, one homer off Mike Trombley
September 22, 2002: Two homers off Chan Ho Park
April 14, 2004: Two homers off RA dikkey
August 30, 2005: One homer off Edison Volquez, one homer off John Wasdin
April 25, 2006: One homer off Bobby Livingston, one homer off Jake Woods
June 1, 2006: One homer off Paul Byrd, one homer off Fernando Cabrera
July 8, 2006: Two homers off Josh Beckett
August 24, 2006: Two homers off Nate Robertson
April 27, 2007: One homer off Ervin Santana, one homer off Justin Speier
August 15: 2007: Two homers off Garrett Olson
August 2, 2007: One homer off Jeff Karstens, one homer off Kyle Farnsworth
May 21, 2008: One homer off Paul Byrd, one homer off Jorge Julio
June 19, 2008: One homer off Phil Dumatrait, one homer off John Grabow
August 23, 2008: Two homers off Scott Kazmir
September 23, 2009: One homer off Brian Duensing, one homer off Bobby Keppel
Jermaine Dye did play 9 games in his career vs the Phillies, hitting .367 with 1 homer and 5 doubles (OPS of 1.000)