Referring to last season's Champions League, after an incident involving Sergio Aguero in City's game against Monaco, Guardiola said that the Spanish referee "likes to be different".
"I remember what happened last year," the manager told BT Sport. "It was 1-1 at home to Monaco when there was a clear penalty on Aguero and what should have been a red card, but [Lahoz] didn't call it.
"We went from a possible 2-1 lead to 2-1 deficit. These types of situations are very important. In the right moment we miss the right decisions.
"The referee is a special guy, he likes to be different. Whenever people see the things, he will decide the opposite."
City are next in action with a game against Tottenham Hotspur on Saturday.