No, at this time you cannot pass through the security checkpoint with a Leatherman multitool in your "carry-on" luggage. The following are generally permitted under the current TSA rules (updated 3rd January 2018) but its worth remembering that it may still be subject to additional screening or not allowed through the checkpoint.
Juice CS3, Tread, Tread LT, Tread Metric, Brewzer, Grind, Hail + Style PS, Jam, Piranha 2, Thruster, Style PS, Pump, Rail, Cam.
International laws vary and the final decision rests with the TSA officer on whether an item is allowed through the checkpoint for the safety of all crew and passengers. Please check the www.tsa.gov website for a full update on their Sharp Object policy. Also note that lost, stolen or confiscated tools are not covered by the Leatherman warranty policy.