I was just wondering how i could get player 1 or 2 or 3 or 4 through script so if player 1 activates a trigger it will be different then when player 2 does it?

Something along the lines of this should do it.

// Example script. Depending on certain things GetEntArray would be better but make sure to thread that and set the values to self
// threading: thread TrigStuff();
// array threading: Trigs = GetEntArray( "TrigPlay", "targetname" ); for( i = 0; i < Trigs.size; i++ ) Trigs[i] thread TrigStuff();
TrigStuff()
{
	// If use array comment below out
	Trig = GetEnt( "TrigPlay", "targetname" );
	while( 1 )
	{
		// If use array comment below out
		Trig waittill( "trigger", user );
		// Uncomment below if using array
		// self waittill( "trigger", user );
		if( user == GetPlayers()[0] )
		{
			// Player 1
		}
		else if( user == GetPlayers()[1] )
		{
			// Player 2
		}
		else if( user == GetPlayers()[2] )
		{
			//Player 3
		}
		else if( user == GetPlayers()[3] )
		{
			//Player 4
		}
	}
}

EDIT:

Loool, PRO you beat by a few sec there. i removed mine since it was kinda the same.. 

Something along the lines of this should do it.

// Example script. Depending on certain things GetEntArray would be better but make sure to thread that and set the values to self
// threading: thread TrigStuff();
// array threading: Trigs = GetEntArray( "TrigPlay", "targetname" ); Trigs[i] thread TrigStuff();
TrigStuff()
{
	// If use array comment below out
	Trig = GetEnt( "TrigPlay", "targetname" );
	while( 1 )
	{
		// If use array comment below out
		Trig waittill( "trigger", user );
		// Uncomment below if using array
		// self waittill( "trigger", user );
		if( user == GetPlayers()[0] )
		{
			// Player 1
		}
		else if( user == GetPlayers()[1] )
		{
			// Player 2
		}
		else if( user == GetPlayers()[2] )
		{
			//Player 3
		}
		else if( user == GetPlayers()[3] )
		{
			//Player 4
		}
	}
}

thanks that was fast ill try it latter when i get home