If freedom of speech is absolute, how come it's not applied for private spaces and for the Internet?

Freedom of speech does not apply to:

Trade secrets

Threats of violence

Good news, bad news for NASCAR Cup teams ahead of Mexico City weekend - NBC Sports

HIPAA violations

Conspiracy

Insurrection

No One in the Movies Stays Dead Anymore - Yahoo

Terroristic threats

False advertising

Insider trading

Can you describe what it's like to live in a town known for Harley Davidson motorcycles?

Fraud

Perjury

You have freedom of speech. If I loan you my computer, I can tell you not to use it for certain things, because it’s mine, you have no right to use it, and if I give you permission to use it I can tell you what you can and can’t do with it.

From Trader Joe’s to Children’s Hospital, these are the Colorado locations where you could have been exposed to measles - The Denver Post

If you’re wondering why free speech doesn’t apply to the internet, it’s because you have no right to use other people’s stuff for free.

And much, much more.

Revenge porn

Boeing Stock, Up 64% From April Low, Upgraded To Buy As Trump Game Piece - Investor's Business Daily

That’s what it is. You have no right to use other people’s stuff. If people let you use their stuff, they can tell you how you can use it, and they can tell you to stop using it any time they want.

No freedom is absolute.

Child pornography

Telescope Captures First-Ever Ultra-Fine Magnetic Stripes on the Sun’s Surface! - The Daily Galaxy

Revealing classified information

You have freedom to travel. If I loan you my car, I can tell you not to take it out of town, because it’s mine, you have no right to use it, and if I give you permission to use it I can tell you what you can and can’t do with it.