Import .CSV data type without using uniqueID


I’m building an app that assigns various hourly rates to an employee. The employee is stored as one data type, the rates are in another. We allow the user to import .CSVs when they have a lot of data.

I can import the rates by employee when I use the employee’s unique identifier. I’d like to allow the user to put in the .CSV column something more user-friendly, like the employee’s last name. Can this be done?