If you wish to quickly add a swimlane to your board, one of the quickest ways to do so is by duplicating an existing lane on the board. Here's the lane we want to duplicate and the Settings icon to get us started:
Chose the Board Editor, then simply click on all the cells within an existing lane while holding down the shift key (mine turn green), then click "Duplicate". The duplicated lane turns purple - just position this where you want it on your board.
Once you've created the new lane, just re-label your cells and headers as needed.
You can obviously add or delete cells and headers through normal editing functions.