Private boards

[Emilie Lashmar]

Hey there,

I have just created a private board and invited two members I wish to have access. I would like to assign another member to just particular cards, and not have visibility to the whole board?

Is this feature available?

Thank you.

[Francis Peixoto]

Board access is binary. They either have it or they don't. 
If you want some users to only have access to a subset of cards, you could create a separate board and copy those specific cards to that new board, which the users would have access to.