My guess is that the reason she made a false accusation was probably because the consensual encounter was videoed, and she may have been embarrassed or worried that it would circulate. I'm not sure if feminism or propaganda would have influenced the decision to make a false accusation. Since this happened at a Catholic university, it's also possible that she may have been trying to salvage her social standing or reputation, by claiming that she would not voluntarily have had sex with two men in a bathroom at a party. It may not be because of feminism that she did this, but perhaps because of certain attitudes which feminists have traditionally opposed.
I would also note that the victim of the false allegation was a man of color. There was once a time not too long ago when there were white women falsely claiming to be raped by black men, which would then incite a lynch mob. Emmitt Till was lynched just because some white woman claimed he whistled at her. I don't know if that was the motive in this case, but it's something that should be mentioned. However, I would also say that this, too, would have nothing to do with feminism.
Of course, I don't deny that I've seen women who hate men or tend to be angry towards men, though they're not always feminists. Some people are just nasty in general; that's a human trait shared equally by men and women.