Parents need to set 'limits' for their children. = Parents need to set/place/impose 'limits' on (the behavior of) their children.
I'm trying to be patient with him, but I've just about 'reached my limit'. [=reached the point where I can no longer be patient]
The damage from the fire 'was limited to' the rear of the building. [=only the rear of the building was damaged by the fire]
(..) that you won't be able to keep. We're in Washington. They're the only promises we're allowed to make. You know, you need to learn how to set some limits with her. Because if not, she is gonna walk all over you. I know. You're right. ...values that we hold dear, (..)2016 TvShow: Designated Survivor Title: Pilot Season: 1 Episode 1