is it possible to drive the LEDs on a parallel basis with this kind of constant current power supply ?
No you can't drive LEDs in parallel with a constant current supply. If you try one LED takes more current than the others because the forward voltage drops are all slightly different. This then gets hot forcing the forward volts drop to reduce even more forcing even more current through the LED which eventually burns out and so the process starts on the next one.
So for an LED with a 700mA current requirement you need a 700mA constant current drive. You can put these in series up to the maximum voltage the constant current driver will supply.