espocrm/custom/Espo/Custom/Resources/metadata/logicDefs/CMietobjekt.json

{
    "fields": {
        "objektlage": {
            "required": {
                "conditionGroup": [
                    {
                        "type": "or",
                        "value": [
                            {
                                "type": "equals",
                                "attribute": "objekttyp",
                                "value": "Wohnung"
                            },
                            {
                                "type": "equals",
                                "attribute": "objekttyp",
                                "value": "Einzelne(s) Zimmer"
                            }
                        ]
                    }
                ]
            }
        }
    }
}