Is there any way to make a field that is divided into sections so that when the form is used each section can only be edited by the authorized person depending on there log in password.

There's no way to split up a single field into separate data entry elements. What you can do is find a way to spit up the data format itself, create separate fields for each part and set security for each field individually. For any relations that reference that data as single string, you can define a calculation field that returns the data from the separate fields as a single string, you can then reference that field instead.