> OTOH I would be happy with a software that is basically a web frontend for Postgres that can be customised in a way that a client can only see and edit specif

> OTOH I would be happy with a software that is basically a web frontend for Postgres that can be customised in a way that a client can only see and edit specific fields based on assigned rights. Take a look at Adminer [1] and their Adminer Editor [2] (the later is what you're asking for). [1] http://adminer.org/ http://adminer.org/ [2] https://www.adminer.org/en/editor/ https://www.adminer.org/en/editor/