Among Friends the church is the assembled body of believers. The “Church” exists where two or three are gathered together in his name.
If a Friend has issue with another Friend, it is brought before the meeting and probably would be put before a “Clearness Committee” to discuss, pray and meditate upon, then their recommendation would be given to the Meeting. The Meeting would then reach some consensus and give their “judgement”. In some Meetings the appointed Elders would “elder” the offending Friend…in some cases if that Friend persisted in an “unQuakerly” fashion, they would be “read out of Meeting”.
To me it’s clear it is the local meeting of the church/assembly/congregation/community that is spoken of here…but I’m not a Catholic, so I wouldn’t necessarily hold to your views on the subject.