Database
[{A:"CLEYMAR_COMPANY",category:{ENGINEER:{name:"eng"},ARQUITECT:{name:"arq"}}}]
Query
db.collection.aggregate([{$match:{A:{$in:["CLEYMAR_COMPANY","VIC_COMPANY"]}}},{$addFields:{category:{"$arrayToObject":{$filter:{input:{"$objectToArray":"$category"},cond:{$in:["$$this.k",["ENGINEER","ARQUITECT"]]}}}}}}])