I know about dynamic IPs, but, how I said, this is the current method until I find something I can use from hook. steam id, like, duh????
If you say so, I don't support non-steam, Amxmodx has a slot reservation plugin which works for admins too, but you can use it with IPs too, so I don't see where is the non-steam support for this.
Amxmodx offers it as AN option, it's not the ONLY option and definitely not the recommended method.