Yes, it is true that Laura Loomer is banned permanently from both Uber and Lyft. Laura Loomer is an alt-right member of the Republican Party who has gotten herself in quite a bit of trouble with her Twitter account. First she was banned from Twitter after tweeting hate comments toward the Minnesota representative who follows the Muslim faith.
Then Laura Loomer began tweeting that the terrorist attacks in New York City were because of the Uber driver involved being of the Muslim faith. Loomer tweeted that someone needs to create a car service like Uber and Lyft who will not hire anyone of the Muslim faith.