A client has asked if she could hide two checkbox for only specific users to check
Yes, you can!
This is a specific permissioning customization, so at the moment you can only do using lowcode!
Você consegue sim, mas no momento esse tipo de permissionamento específico você só consegue utilizando lowcode, acredito que o seu time consiga configurar essa regra de apenas certos usuários com perfil X poderem visualizar aquele campo em específico
There was another customer asking a similar question, and the low-code implementation can be seen here: User Permissions
Here is a link to the documentation about profiles/roles and access levels:
Based on the roadmap Jestor has talked about, you may be able to accomplish this via Roles in your account settings in the next few months. ( Noted in this YouTube livestream today @ around 5:15 here: New Roles feature and Sales CRM template - YouTube )