Ideally this header/seperator can have metadata attached - but this is optional.It reads like you want group headings, or should at least try it.
- Right click column heading row
- Click Groups
- Scroll down & click More...
- In Custom Grouping Schemes at bottom click Add New
- Assign it a Name i.e. Label / Album
- In Pattern (depending on your metadata tag structure, the field name for the label tag and album tag, i.e. [%label%] / [%album%]