@Thales Todorovski you can't, but the Cards view shows people only cards they're assigned to, sorted by board which might achieve the same result. However there's no way to add someone as a member to a card without them being a member of the board, and anyone who is a member of a board can move cards around, remove themselves from cards etc.
If you had to thrive a new habit during a lockdown, what would it be? Trello
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