Forward or assign an Outlook task to other Outlook user

Are there any methods that will allow a Mac Outlook 2011 user to forward or assign an Outlook Task to another Outlook user, with recipient on either Mac or Windows version of Outlook (ideally either, as we have a mixed-platform office)?  Even if not feasible from within Outlook 2011 Mac, using a third-party utility or app would be fine, including on iOS -- any suggestions would be appreciated.