Looks like that - the stipulation for Turkey was 1,500 would need to travel on official trips, I could see it being similar.Just found this from City's official travel partner - Sportsworld (no, me neither)
Pertinent section.
UEFA and the Portuguese government have requested that all official travel is restricted to day trip private charters to reduce the chance of spreading COVID-19, due to thousands of supporters expected travel from the UK.
Similar to the clubs statement, you can interpret it however you wish, but I read that as no restriction on unofficial/independent travel.