SnapDrive should be able to do this as I do it all the time with two LUNs in an LVM volume and it works fine. However, my LUNs are 1 per volume/1 per controller. I've never tried with multiple more than 2 LUNs per volume though.
You can script it too, but it would be very cumbersome...SnapDrive would take care of all those nasty details.