As far as i know its never been done. and there are technical reasons as well as practical.
1 You are the Kaluen you are not in any other role but the Kaluen.
2 The coding to achieve such a satisfactory result there would need to be something in the coding.
3 support would be a PITA
4 computer hardware and software has come a long way in 10 years what was not possible then is now possible
However I have an idea for a workaround but no guarantees it will work... Screen Share
Pros: you are both in the same sub, your desired outcome is relatively achieved

Cons: both can't carry out orders at the same time, cant be in 2 positions at once (IE one cant be in the control room and the other in the navigation charts), resource drain by the screen sharing software.