#define		MAX_CONNECTIONS 	3

public OnIncomingConnection(playerid, ip_address[], port)
{
	new
	    count = 1;

    for (new i = 0, j = GetPlayerPoolSize(); i <= j; i++)
	{
		if (IsPlayerConnected(i) && strcmp(GetPlayerIP(i), ip_address, false) == 0) 
		{
			count ++;
	    }
	}

	if (count > MAX_CONNECTIONS)
	{
		Kick(playerid);
    }
    return true;
}

stock GetPlayerIP(playerid)
{
	new
		str[39 + 1];

 	GetPlayerIp(playerid, str, sizeof(str));
	return str;
}