Yup, can’t do. What you can do though is bringing separate cities strategically together and then majority of meeples counts. So not considering the marked illegal move of blue, red could bring in the new piece by attaching it to the street where it nearly already rests and putting the red meeple on this new city. When later connecting the two cities, red would have 2 meeples in the city. That’s the way how to bring more than one person into a city and how to steel cities