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

Insurrection

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.

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.

This is the safest place to hide when a nuclear bomb strikes - The Brighter Side of News

And much, much more.

Freedom of speech does not apply to:

False advertising

Don't Like The New Xbox Game Hubs? Here's How To Turn Them Off - Pure Xbox

No freedom is absolute.

Trade secrets

Perjury

A cardiologist overhauled his diet to boost his longevity. Here's the grocery store path he takes to stick to his meal plan and avoid bad foods. - Business Insider

Fraud

Revealing classified information

Terroristic threats

Are there any more 'nun' jokes?

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.

Revenge porn

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.

US-China trade war sideswipes Europe’s carmakers - politico.eu

Threats of violence

Insider trading

HIPAA violations

Aaron Judge's 469-Foot Home Run in Kansas City Left Baseball World in Disbelief - Sports Illustrated

Child pornography

Conspiracy