Yes, but this isn't the same thing; my request is for a kind of coordination in game, not just in editor.
For example, two infantry squad in visual contact wait each other for wp near two doors of a big building; When each unit reaches its linked wp, then proceeds to enter the building from different doors.
"Exit after" is a coordination based on time factor, but if a units for some reason is stopped (enemy fire), the coordination fail because the other units proceed anyway.
What do you think?