[Abagail]

pawn Код:

new pIP[16];
GetPlayerIp(playerid, pIP, sizeof(pIP));
mysql_format(MySQLCon, query, sizeof(query), "SELECT * FROM `playerdata` WHERE `ip` = '%s'", pIP);
mysql_tquery(MySQLCon, query, "", "");
new numrows = cache_num_rows();
if(numrows >= 3) // then the player has 3 or more accounts with the IP.

This should work. It basically runs a query and then checks if 3 or more rows are returned. Change "playerdata" and "ip" to work with your gamemode/database.