[FG28_Kodiak]

It's not possible.
GamePlay.gpHUDLogCenter(..) doesn't support it, i've tried it too .

You can use the timeout command to show one message after another.

SendScreenMessageTo(1, "Note");

Timeout(5, () =>    // Time in Seconds
{
     SendScreenMessageTo(1, "Press TAB and 4 at ANY time");
});
Timeout(10, () =>    
{
SendScreenMessageTo(1, "Load any submission available in the list");
});

etc.