Make a new account from a fresh email and you are probably good to go.
How would they know it is you? If you use your work email, yeah, you have to ask your employer to give you another one. But is that so hard?
If the permaban is appropriate is a different discussion. Without seeing that comment that go you banned, it's impossible to say.
When you need github access to have so many jobs, it starts to reach the point where basically no comment should result in a permanent ban.
"They are a private company and can ban whoever they want"...
OK, and suddenly you find yourself banned for expressing an opinion which totally fits with your own ideology and which you thought was the epitome of virtue. You just forgot the company got bought and the new management follows a different ideology. Is the company still right in their decision to ban you? If not, why not?
Imagine, if you will - a financial analyst getting banned from Bloomberg Terminal due to some issues in Bloomberg.com.
Isn't that silly?
- Mitt Romney
Systems in use at several Big Tech companies can cross check any number of (meta) data attached to the account, resulting in flagged accounts and possibly even automated bans.
This is the reason that at least some permanently banned people on Twitter need to use VPN, a new name/bio and a burner phone to create and maintain a new account. Using a IP address used to access the old one and/or the same phone number and/or the same or a very similar name/bio (probably using a Levenshtein like algo to check similarity) automatically flags the new account.
Whether or not the comment warrants a permaban or not, I’d gladly delete it, avoid the behavior in the future, and also clearly regret it!
IP? Unlikely. You probably do not use a static IP that only you use, right?
Your ssh keys? Delete them.
Cookies? Delete them.
Fingerprint? Use a different browser to find out.
Etc etc.
If you are not too technically versed, maybe start from a fresh computer.
Work domain.
Work projects.
Browser fingerprinting.
Vscode telemetry data.
Windows telemetry data.
There are lots of ways to track it, and probably there’s a machine learning algorithm that helps it, because every time I find a loophole, when I’m suspended again the loophole stops working.