It's not entirely individual, no. I think I started by saying there is a 'default' right and wrong which is whatever is defined that way by the conventions of the society. A personal right and wrong may differ from the default. There is huge pressure to conform, so in many instances the personal ideas of right and wrong may be suppressed in favour of going along with the crowd view in order to fit in.
We could consider homosexuality as an example. Over the course of the last fifty years, in many societies, the default (and legal) definition has migrated from being 'wrong' to 'right'. And obviously many people have suppressed their homosexuality, which they believe to be 'right', because society in general, or their peer group specifically, believed (or still believe) it to be 'wrong'.