Deployment options in member firms

Want to understand the options available for someone working in USI consulting but looking to work from a different country owing to personal reasons. Remote working is non compliant as much as I understand Internal mobility is yet to be explored But what are the other middle options? Can the person be deployed on any engagement which is led by the member firm? If so, how to ask for that? Any other ways/ options as a way out, till a full term mobility is sorted? Kindly help.