<Help>Trigger problems--Triggering unit

[kyo_fight]

Event
A unit begin casting an ability
Condition
Ability equal to xxx
Actions
Apply Camera[1] for Triggering player over 0.00sec
but i can replace "Triggering player" with "Owner of triggering unit"
They both work
i think when you share control with other players,they use ur unit to cast that spell,and my camera changes instead of him. But any other important difference? would this cause memory leak?
another example,
Event
A unit finishes construction
Condition
N/A
Actions
If unit type of constructed unit equal to xxx
then do ......
i can replace constructed unit with triggering unit
how's this case? :? :?

 

[ArchWorm]

Imagine: Two events happen at once: construction and something else. Then you will not know which unit returns Triggering Unit. So, this is the difference.

I'm not sure about the leaks. Probably it mustn't.