This is very straightforward as you can tag when you create a new event/SLE.
The curriculum that you have assigned to your ePortfolio will be listed at the bottom of your new event page. Firstly, you will need to select a Domain:
Once a Domain is selected the Key Capabilities will open below. You MUST tag to a key capability to save the event:
It is the tagged Key Capabilities rather than Domains/Learning Outcomes that will show on your reports.