Use read and write authorisations to restrict access to individual records within a permissions group.

1. Go to the  Administration tab in the function bar and select  Users >  User groups >  Search, then open the user group you want.
2. Add a Rule to a permission (read, change, etc.) to further restrict access to individual records.
3.  Save your input by clicking on the icon in the top left-hand corner of the input window.