Your question is slightly vauge in what you are attempting to accomplish.
Are you just wanting to use a workflow to move an item from one site to another. If so, then a site workflow or a workflow on that item should be able to achieve this.
If your source lise and destination list are of the same content type (list > list) then this shold not be a problem. What platform of SharePoint are you running? SharePoint Server or SharePoint Online. The reason for that question is that there are different ways depending on the platform.