[Mauzen]

You could create a SendRCONMessage function with SendClientMessage and IsPlayerAdmin.

pawn Код:

stock SendRCONMessage(sendername[24], color, message[])
{
    format(message, sizeof(message), "%s: %s", sendername, message);
    for(new i = 0; i < MAX_PLAYERS; i ++)
    {
        if(IsPlayerConnected(i) && IsPlayerAdmin(i)) SendClientMessage(i, color, message);
    }
    return 1;
}

Untested, you may have to give message[] a specific size.