Rumors have it LMMS now does support Lv2.
https://github.com/LMMS/lmms/wiki/Lv2
Using 1.3 alpha for Linux.
https://github.com/LMMS/lmms/wiki/Lv2
I cant figure out how to use them though, I installed on my Linux (openSUSE) the calf Lv2 plugins, but can't figure out how to use them in LMMS.Lv2 is supported on master.
Using 1.3 alpha for Linux.