hi,
This is possible. The CueCore can only 'listen' to a band of 50 art net-channels wide. By default this band starts at channel 1 (Universe A). In the settings page you can change the 'DMX Input Address' to 513 (Universe B). Now you can use channels 1-50 on Universe B for triggering actions.
Meanwhile you can still have a ArtNet to DMX conversion on Universe A.