Allegations against Mr Wang previously emerged in December after a British model claimed on TikTok that the designer had groped him during a concert at a New York City nightclub in January 2017.
In the video, which subsequently went viral, Owen Mooney, 26, said: "I was by myself at one point and this guy next to me obviously took advantage of the fact that no one could move.
"And he just started touching me up. Fully up my leg, in my crotch. It made me freeze completely because I was in so much shock."
Two fashion watchdog Instagram accounts, @DietPrada and @ShitModelManagement, then began sharing several anonymous claims of sexual misconduct against the designer.
Mr Mooney later criticised what he called the "radio silence" from the fashion and film industries in response to the allegations, which affected people who were "male, queer and trans".
"It seems #MeToo quite possibly could be lacking in inclusivity," he said on social media.
In a statement at the time, Mr Wang denied the allegations as "baseless and grotesquely false" and said he would "hold accountable" those responsible for spreading them.
Mr Mooney, from Peterborough, is one of 11 people being represented by the victim's rights lawyer Lisa Bloom, who has led a number of high-profile sexual harassment cases.
She told the BBC most of the alleged incidents were linked to LGBT clubs and that no legal action had yet been taken.
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Allegations about Alexander Wang's conduct first circulated online four years ago.
Nick Ward, 28, who works in construction, alleged on Twitter that Mr Wang had grabbed his crotch at the Brooklyn Mirage nightclub in New York after midnight on 10 September 2017.
Mr Wang denies the claim and being at the club that night.