[Hiitch]

pawn Код:

if(strcmp(plrIP, "YOUR IP HERE"))
   {
     Kick(playerid);
   }

I'm not 100% sure if this would work (the thing I will suggest below) but I've tried it connecting to my own server through an IP that was set up.

pawn Код:

if(!strcmp(plrIP, "127.0.0.1"))
   {
     Kick(playerid);
   }

I'm just thinking of this, dont know if it will work or not though.