It does, but the Transaction Field ID on your FAM Transaction Field Map record is not just going to be the Custom Segment Int ID because the system sneaks in another piece to the ID name on line items. So if your Customer Segment ID is cseg_segment1, then the actual field on the JE that it posts to is cseg_col_segment1 or something along those lines. That's what you have to put in the Field Map record. You can get to that value by going to a JE and using NetSuite Field Explorer or a similar tool. That might apply to Source Transaction Field ID too, I can't remember. And you have to check the Transaction Line Field box too.

Thanks again! I think the problem I was having is I didn't have the field mapping done before I had attempted to run a depreciation... even though I deleted the JE, the history was still there... so I created a new asset and started over and it worked like a charm!