[Alteh]

why not?

look it:

Code:

public OnPlayerCommandText(playerid, cmdtext[])
{
if(!strcmp(cmdtext, "!cmd", true))
{
    SendClientMessage(playerid, -1, "Message 1");
    return 1;
}
if(!strcmp(cmdtext, "&cmd", true))
{
    SendClientMessage(playerid, -1, "Message 2");
    return 1;
}
if(!strcmp(cmdtext, "@cmd", true))
{
    SendClientMessage(playerid, -1, "Message 3");
    return 1;
}
return 0;
}

If that's possible... Why not with the function of Pawn.CMD?