Unless the switch you are replacing is a 3-way switch, and you will be putting a controller where the slave switch would normally be, then no, this will not work. If the switch you are replacing is the only switch then you have two choices.

1) put an inline X10 module in the fixture of one of the three lights and replace that switch with the controller.

2) Cut the hole in the sheetrock bigger to make room for a 4-gang box. You can get a 4-gang retrofit box that has little swing-out ears that do not need to be nailed to the stud. You use it as a guide and cut the sheetrock on the side opposite of the existing stud. This will give you room to pry the existing box away from the stud.

I replaced several of my electrical boxes to add additional space for a controller. I also replaced a single switch that controlled a fan/light with two in-line modules and a controller. It was a real feat to get both of thoses in-line modules in the fan mounting box!