Click on the slice in the donut to which you want to add multiple events, such as working from home or other. A context menu will appear under the donut. Click the Plus sign under the slice.
From here, you can add an additional event within the current location. Just select your category, and punch in the times. This event will override whatever else Life Cycle has recorded in that time zone, or just fill in the gap if there's nothing there at all.