Yes, there is a way to lock the formatting in a pivot table column. Here are the steps:

1. Select the column that you want to format in the pivot table.
2. Right-click on the column and select "Format Cells".
3. In the "Format Cells" dialog box, select the formatting options that you want to apply to the column, such as the width, font, and alignment.
4. Click on the "OK" button to apply the formatting to the column.
5. Right-click on the pivot table and select "PivotTable Options".
6. In the "PivotTable Options" dialog box, click on the "Layout & Format" tab.
7. Under "Format", check the box next to "Autofit column widths on update".
8. Click on the "OK" button to save the changes.

By checking the "Autofit column widths on update" option, the formatting that you applied to the column will be locked in place and will not revert back to the original width when you change the selection in any of the fields. This will ensure that your pivot table column remains formatted the way you want it to be.