Note that the description in your link (clickable makes it a lot easier to follow) calls it an "LED Controller" rather than "LED driver".
The RGB LED strips i have are the analog neo pixel led strips from adafruit. I need to have three led strips each being a meter long and be able to change the color of each strip individually. i realize now that i should have bought digital rgb strips but its too late now. i just need to know if its possible to control 3 led strips each being a meter long individually with the led controller. if not im probably just going to have to buy digital strips.