long[] ids = { 1, 2, 33, 23 };

Func<Document, long> func1 = (doc) => doc.Id;
Func<long, long> func2 = (id) => id;
Func<Document, long, Document> func3 = (doc, id) => doc;

var docs = documents.Join(ids, func1, func2, func3);
var list = docs.ToList();

Func<DocRecipientInfo, long> func11 = doc => doc.Id;
Func<long, long> func12 = (id) => id;
Func<DocRecipientInfo, long, DocRecipientInfo> func13 = (doc, long id) => doc;

documents = (ObjectQuery<CtrDocument>)from document in documents
                                              from docSenderInfos in document.DocSenderInfos
                                              from docRecipientInfos in
                                                (from docRecipientInfos in docSenderInfos.DocRecipientInfos select docRecipientInfos
                                                  ).Join(ids, func11, func12, func13)
                                              select document;


        var docs = documents.ToList();