With a new update to lnd, it is now possible for nodes to enable a hybrid connection mode that allows both Tor and clearnet connections.
This feature will be in 0.14, and I'm currently testing it myself.

You can now connect to my node via IPv6 as well: 

03bec3989098df0675033530169ef105b1bd3be8fd989cb7955cb4b59616ab3530@[2a02:908:2222:7c60::8231]:9735