Yes it will - and it will assign progam membership with the first program status of that program's channel. Any time we import lists, we leave Acquisition Program as "NONE" (unless we're manually uploading event attendees). Afterall, the lead didn't enter Marketo on their own will. We then include a flow step in any smart campaign that is indicative of a response, e.g., "fills out form", that essentially does the following:
Change Data Value
If "Acquistion Program Name" is empty
ATTRIBUTE: "Acquisition Program" NEW VALUE: [Program Name]