You can use the various desktop and mobile clients to add details to areas outside of where you live, even if it's just adding buildings from the aerial views.
As far as Street Complete goes, you can save it for specific mapping days, and go somewhere just to map it. There will still be a record of where you were, but it will be generic. e.g. If you visited Bristol for the day and did a load of mapping, that's not going to reflect your day to day life, or any part of the day that you didn't map ๐