Not only was dominated too strong a word, it's nowhere in the vicinity of describing the matchup. Cowhide said your memory is foggy - he was being kind.
During the regular season, in the three years that Grant was with Portland, Malone averaged 23 and 10 in games against Portland, while Grant averaged 10 and 8 against the Jazz.
During the playoffs, the Jazz played Portland in 2 of the 3 years Grant was with the Blazers. In 98-99, Malone averaged 20 and 12, while Grant averaged 13 and 9. In 99-00, Malone averaged 24 and 8, while Grant averaged 7 and 8. Don't forget during these years, Malone was a geezer at an age when a lot of guys are retired, while Grant was in his prime. Grant wasn't in Malone's league let alone dominated him. Malone had plenty of highlights while he was averaging double figure rebounds and scoring in the mid-20s every game against Grant. Give Grant credit for playing hard like Jarron Collins used to do, but Malone absolutely killed him, as he should a player of Grant's caliber despite Malone being in his mid 30s and Grant being in his mid 20s.