Hi Creating Kits,
YES! This is one of my favourite features & is explained in detail (and much much more) in the Ultrabeat Unleashed tutorial:
1. Open a Multi-output instance of Ultrabeat.
2. In the Assignment/Mixer section of Ultrabeat next to each voice is the output for that voice. It should read "Main". Assign each voice to a different output.
3. Open the Mixer window in Logic and you will notice that the channel strip with ultrabeat has a small + button in the lower right corner. Click it to create AUX tracks for individual voices.
Ultrabeat will assign the inputs to the voices you have assigned.
Play your Ultrabeat sequence & you'll see that different voices are now being outputted through their own aux channels.
You can now add effects, easily mute and solo parts from within the Mixer window.
p.s. I really recommend the tutorial - Ultrabeat is a deep and powerful drum synth & the tutorial makes it very easy.