Civevac does not use the word target but only entering base to base with a civilian. Can I civevac multiple DIFFERENT civilians with a coordinated order?
You need to select the same civilian to Civevac, the same way you need to select the same antenna/console/spot for Targetless ammo/whatever when doing a coordinated order.
"same spot for Deploy AP Mine etc...." /illustrating the exception All the examples you listed actually have a target (Targetless has a target, it's just not a trooper). BUT the same is true of Civevac (Synchronise Civilian - the Skill that allows you to enter the Civevac state - refers to the 'targeted civilian' so it's clear that you do need to identify a target and therefore can only have 1). Also, it's worth noting that you can't perform the Synchronise Civilian skill as part of a Co-ordinated Order at all, it's explicitly not allowed.
Fo ref: http://infinitythewiki.com/en/index.php?title=Civilian_Rules&redirect=no#Synchronize_Civilian