How do I make it so a client has access to the a card on the board but doesn't see the whole board?

[Matthew Cook]

I have a post production company and would like to have all my projects on one board, I would also like the client to be able to view the cards which would be allocated for their project so they can add review notes and links on it. 

Is this possible?

[Adam Cao]

👋 Hi @Matthew Cook, I just launched the External Share Power-Up today! This Power-Up lets you share your Trello boards with clients through a secure generated link. Like this one I generated for you: https://trll.io/EcLdfdlb-S/for-matthew-cook?pwd=9koqtaaMdYd6BV5l

You can also decide on which cards to share with them using list and label filters. For example, this share link will only show cards with the "Email" label: https://trll.io/vy0T76z9Q5/for-matthew-cook-with-filters?pwd=lJLKAXTPgqAUZeO8

It's still in beta but I would love your input and feedback!

[Iain Dooley]

@Matthew Cook you can only do that by creating a separate board. You can synch lists up using Unito for example, or you can create linked copies of cards using Butler or other API automations, but there's no setting for this to happen all within one board.