Hi @SP Dev ,
You need to create two lists so that when you set the criteria later, you can filter address in the "work address" drop-down list based on the selected unit.
- Work Unit – List of unit – Parent List for "Work Address" list’s 'work unit' column.
- Work Address -List of address with 'work unit' as lookup column from “Work Unit” list.
Please refer to the specific process: Cascading Dropdown in SharePoint List using InfoPath Forms
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