Guest Get/Update only specific columns in table

the Guest can Get/Update only a specific table (already implemented via role)
But is it possible that the guest can only see (Get) and update specific columns of this table?

Thanks in adavance for your help!

You can’t configure a role for field-level permissions. But you can write a server side script that only allows certain fields based on the current role. See here for some examples.

You could have a script for get.pre_process that changes the ‘fields’ param for the query based on role.

Basic steps would be:

pre_process script gets role for current user
pre_process script removes disallowed fields from the request based on role
GET completed with possibly modified fields