Yes, you are allowed to be logged into one account from multiple devices and locations at the same time. there will be no issue at all. but multi-accounts login from the same pc is against Fiverr’s TOS.
Hello, Thats not a problem, usually I use fiverr in my office, later in my home, and using the app, every have different IP but is the same account. the problem is when are you open your account in a different country , sometimes when open fiverr in another IP they send me a message asked for a unknow device, but is only for security