FreeBSD Port
LAM is part of the official FreeBSD ports tree. For more details see these pages:
FreshPorts: http://www.freshports.org/sysutils/ldap-account-manager
FreeBSD-GIT: https://cgit.freebsd.org/ports/tree/sysutils/ldap-account-manager
Docker
You can run LAM and LAM Pro inside Docker. See here:
https://github.com/LDAPAccountManager/docker/pkgs/container/lam