When opening the Day2 action Remote Console as a second user I can see another user logged in.
Aria Automation 8.x
The default Day2 Action "Connect to Remote Console" uses the vCenter remote console session which is a single user session.
In order to use alternative solutions like RDP or SSH, you can however develop a custom Day 2 Action, our Documentation does contain an example but for a different business need:
How to create an Automation Assembler resource action to vMotion a virtual machine