You are not baned for campaigns you are banned from the forum. This includes all your accounts.
Yeah your only that account is banned from the forum but shorena i dont think all accounts are banned.. Actually i also went throught that kinda ban

but i still was able to log in from my alternate that i had created way back earlier
No, bans are given to a person not an account. Using an alternate account to post it called van evasion, and if an account is found to be an alt of an account that is banned, it too will be banned, and the ban will be increased