Shauna Sand Accuses Lindsay Lohan Friend of Sexual Battery

Shauna Sand -- the former wife of Lorenzo Lamas -- has just filed a sexual battery lawsuit against a man who once accused Lindsay Lohan of theft.

According to the lawsuit ... Shauna was hired as Sam Magid's personal assistant for somewhere between $10k and $20k a month. According to the suit, back in October, on her first day at work, Shauna went to pick up food for Magid and his guests and when she got to his house with the vittles ... he allegedly grabbed her breasts and demanded that she have sex with him.

Shauna claims she struggled as she rejected his demands. She claims he then threw money at her and ordered her to leave his house.

She claims he continued the alleged harassment by sending her text messages ... threatening her.

Magid has a Lindsay Lohan connection. She went to his house and partied for several days in August of last year. On a night Lindsay was there, $100,000 of watches and sunglasses were allegedly stolen from the house and Lindsay was named as a suspect. Magid -- who was a long-standing friend of Lohan's -- later recanted the story and said nothing was taken.