each conversation has a context which sets some boundaries and some assumptions, and a group of people who are aware about it. some conversations are in private context, some are in public context. information related to a project's progress should remain in the public context.
private context involves company secrets or 1:1 conversations, they shouldn't be made public without the concent of concerned parties. in a conversation, changing context or saying something out of contexting is considered rude, sure you can change the context and the direction of conversation at transition points, but not in the middle, specially in meetings with a well defined agenda.