[Threshold]

It's < 100, not 99.

Just a shortened and neater version:

pawn Код:

public OnPlayerRequestSpawn(playerid)
{
    if(gTeam[playerid] == Team_Cali)
    {
        if(strfind(name, "[Cali]", true) != 0) //This will only work if the player has [Cali] at the BEGINNING of their name.
        {
            GameTextForPlayer(playerid, "~r~You're not in (Cali)!", 3000, 5);
            ForceClassSelection(playerid);
            return 0;
        }
    }
    else if(gTeam[playerid] == TEAM_SWAT)
    {
        if(GetPlayerScore(playerid) < 100)
        {
            GameTextForPlayer(playerid, "NEED 100 SCORE", 3000, 3);
            SendClientMessage(playerid, -1, "You need atleast 100 score to play on this team.");
            ForceClassSelection(playerid);
            return 0;
        }
    }
    return 1;
}

EDIT: If this doesn't work, then gTeam[playerid] isn't TEAM_SWAT.