Can Canopus Edius professional software flip clips, so that actors look left to right instead of right to left you ask? If not, is there any editing software that can? I think you can with a mirror video filter.
You can flip video clips horizontally with both Canopus Edius versions 3.61 and four. You will want to just drag that mirror filter from the video effects box on to your clip in that time line. Then you can double click on that little mirror icon that shows up in an information box.
You will see that a horizontal flipping needs to become checked in order to enable it. These instructions were for written for Canopus Edius version 3.61 but will also work with Edius version four. Also, you can use the mirroring effect potentially with other video editing software.