Is there a way to allow a user to pick only one row and not add a new row in a Subform field in Zoho Creator

The use case is once the user selects a company name in a subform, they are shown a name of employees in the same subform in a dropdown field adjacent to the company name field from which they can pick only one employee.

ex:

Subform Column 1: Pick Company Name > Column 2: Pick Employee Name

(employee name is shown conditionally as a list of employee of the company selected  in Column 1)

Thanks