Hi Tien, You can set display logic on fields, but not on values within a field. Instead of adding a single "Approver" field, you will need to add multiple approver fields such as "Enrollment Approver," "G&A Approver," etc. These fields would show the approvers that are specific to each department. Then, you would apply display logic so that "Enrollment Approver" is only shown when the Enrollment department is selected, and so on. For specifics on display logic:
If you like my content, please take a moment to view and vote on my Idea Requests: https://tinyurl.com/4rbpr7hf