Jonny, unfortunately no. OAC 4.3 only runs on RedHat 3 and 4 Workstation and then on only one version of the kernel.
As per my understanding OAC is available only for windows and mac platofrms and there is no OAC available for Linux platforms.
Junos pulse client is also available only for windows & MAC OS.
Java based client can be used for l3 connection in case of linux, the details are captured in the below supported platform guide: