Polyvore does not support completely separate tracking parameters for mobile campaigns. However, you may add the <DEVICE> parameter to your existing campaign-level tracking parameters to indicate if the user came from desktop or mobile. Please note that you should be able to segment by device in your analytics platform. If you're using product-level tracking in your feed (cpc_tracking_url), you may add the <DEVICE> parameter to your cpc_tracking_url.
Below is an example of Google Analytics (GA) tracking parameters with the <DEVICE> parameter within GA.
The <DEVICE> parameter will dynamically populate, indicating mobile or desktop based on the source of the click.