A. Be under control :
Examples :
Person A: How is your business going?
Person B: It is coming along well and everything is under control for the moment.
Meaning :
If something is under control, it is going as you want and you direct its development well.
B. Be beyond someone’s control :
Examples :
The whole matter is beyond my control, I can do nothing to reverse the situation.
Meaning :
Impossible to direct or get control of.