She did not say where she got the name Valerie "Flame",
That's what she wrote.
However, she could have said more to the Grand Jury then we know now.
She could have been forced to tell more and told not to repeat it.
That is true.
She can't talk about grand jury testimony, but I don't think that Fitzgerald could force her to not disclose who gave her the name.
"She could have been forced to tell more and told not to repeat it."
A grand jury witness can discuss their own testimony. They are not sworn to secrecy.