I thought you might be interested in looking at Running dedicated server and 2 clients or more on one macine.
https://forums.bohemia.net/forums/topic/126204-running-dedicated-server-and-2-clients-or-more-on-one-macine/?do=findComment&comment=2089871
× Pasted as rich text. Restore formatting
Only 75 emoji are allowed.
× Your link has been automatically embedded. Display as a link instead
× Your previous content has been restored. Clear editor
× You cannot paste images directly. Upload or insert images from URL.