If you are removing the floor for access and to replace and cut a new location, then sure, you can cut the cast iron with a snap cutter.
You would need shielded couplings to reinstall either the end section of cast, or you could splice in ABS or PVC for the 90 bend and flange.
If it's a lead bend, you should remove from the hub, and build it back out from the hub.
Or you can move the bowl back 2" without touching the drain, by using an adapter like the one below.
The Toto Unift adapter, meant for moving a bowl 2"
More information on which bowls they work with.