@Luis Marcelo López Salazar Welcome to the Atlassian community
Currently, when you invite a member to a board, they're going to have access to all information on the board. There's no way to hide certain cards or certain card contents. Your best bet would be to create a secondary board, sync the relevant information from the main board to the other board and just share the secondary board with those particular users. You can sync cards across boards using Unito or create a sort of one-way sync using Butler automation.
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