Not sure if this is possible or not.
I've read the documentation on the wiki and don't believe so, but do correct me if I am wrong.

I am looking for a way to use the "similar to" constraint with the web editor? Have about a hundred groups, with 40-50 being named "main_" and would like the editor to target all groups starting with "main".

Perhaps:
/lp group "group ~~ main%" editor

Unsure how this would work if even considered, or if it's something that's already possible.

Cheers for any help :)

It's not possible to do at the moment.

Would be tricky to do like this, the group argument isn't parsed per-command, it's a generic thing, so wouldn't be possible to implement it this way.

I think it's probably out of scope for the project

You can just use /lp editor. That'll let you edit all groups

@BrainStone that has nothing to do with this ticket. =P

Just wanted to point that out. ;)

@BrainStone the whole reason for this issue is to specifically avoid what you are suggesting lol I think you misunderstand the request ;)