Spence, For my solution you will need to have your primary ISP as WAN1 (your DSL) and your secondary (LTE) as WAN2. Then my setup should function as long as you have support make the 'cell firewall rules' apply to WAN2. However if your doing Full-tunneling then all your traffic will go over the AutoVPN to your HUB, so any 'local' internet usage will go over that and you can't block it (that I'm aware of). You would need to do split tunnel and then only send intra-net (internal) traffic over your AutoVPN tunnel. This way Internet traffic will drop off locally, either WAN1 and WAN2, and then with my method you can block guest to Internet over WAN2 (LTE) when it kicks in.
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