Where we can create a IPv4 and a IPv6 Pool zu automatical create IP address on creating a VM?
And where we can create a traffic limit of GB or TB for a VM?
you can file a enhancement request in our bugzilla.
generally speaking, if someone needs a feature someone have to do the work. if you are a programmer, you can develop it by yourself (see http://www.proxmox.com/products/proxmox-ve/get-involved). otherwise you need to find a pve developer doing the work for you, most times money plays a major role in dev priorities.