No.....
See here:
http://clashofclans.wikia.com/wiki/Lightning_Spell
A partial quote:
"...a number of lightning bolts drop from the 'sky', damaging all Buildings and enemy Troops randomly..."
The red emphasis is mine.
I don't know how many hundreds of times I have dropped a Lightning spell on top of my troops, with zero damage to them, while they are clashing with Clan Castle troops.

