Canon 1-series cameras can save RAW+JPEG at the same time, and can simultaneously save both files to two memory cards. So, yes, in principle you can have RAW on one card and JPEG on another (but in reality you have duplicated RAW and JPEG on each card and would have to delete the unwanted data from each card).
Perhaps you can explain your problem (perhaps from a workflow perspective). What you are asking for is a technical solution to something you have decided is the worfklow solution to your problem; however, if you can share the problem, there may be a more optimal workflow solution.