It is generally not recommended to create multiple Fiverr accounts from the same WiFi connection because Fiverr's systems may detect the multiple accounts as being connected to the same IP address and could potentially flag or suspend them for suspicious activity. If you need to create multiple accounts, it is recommended to use a separate WiFi connection or device for each account.
Its safe to create multiple account with different device. One device ne account. You can use same wifi but service should different.