is it possible to control Entecs Dmxis via Livetraker?

Absolutely!  DMXis is a great fit for LiveTraker.  Basically, you just send MIDI notes on channel 15 to set the bank (bank 1 is the first MIDI note and it goes up from there), and channel 16 to set the preset.

Then, setup a free program called LoopMIDI to send the MIDI to from LiveTracker (OUT) and then select the LoopMIDI port you create in DMXis, and the two will be connected within the same computer.