I have contacted koodo prepaid support reps before regarding port protection and was told that port protection is not available to prepaid customers.
I placed another call yesterday and spoke to a prepaid support rep about my concerns. The rep proposed a process which I agreed to, whereby a note will be added to my account which requires the koodo porting department to go through an extra verification step prior to implementing a port out.
This is not a perfect solution but at least it presents an extra hurdle against illegal porting of a prepaid line.