Quick answer: Yes, Liquid Notes provides an import feature that allows combination of several single-track files to a multi-track arrangement.
Importing several single-track files in Liquid NotesLiquid Notes comes with a feature that allows import of several single-track files at one time, which will trigger a wizard (assistant) that will help you with combining these tracks into a multi-track arrangement.
Select all single-track files with the mouse and drag them onto the Liquid Notes window. This will enable the before mentioned wizard, as seen in this video:
This feature was originally developed for Ableton Live, which is not capable of a multi-channel export. However, it is not limited to Live - rather, it is available for any sequencer and can also be used in stand-alone mode.
Single-track files need to be of same length and tempo, as otherwise Liquid Notes can't combine them!