The users ip address is not transmitted. The availability of the IP address to the server for the client visiting is an unavoidable consequence of the internet infrastructure.
When I say No information - what-so-ever - is transmitted it is to be understood that we are talking about information deliberately transmitted to a receiving entity, with the purpose of phoning-home - and no such transmissions are part of Manjaro.
Any time you connect to the internet and browse a webpage or downloading from an ftp server - any action you do on the internet will always leave your
fingerprint whether you like it or not.
Anyone that paranoid should stop using the internet.