As of version 18.02-alpha.0, there is no mean of grouping tunnels.
SSH Tunnel involves a concept of Smart Group, but it’s a bit “magical”, not that straightforward for techies. Smart Group is actually a filter for saved keywords, its ability can be very limited.
In Core Tunnel, we considered to go for Tags. Compared to Smart Group, it’s flexible and clear-cut, less “magical” and more “straightforward”.
Any other innovative ways? We’re open to discuss different ways before we set to work on it.