What I tested with 0 results:

string queryForeignSecurityPrincipal = "(&(objectClass=foreignSecurityPrincipal)(memberof:1.2.840.113556.1.4.1941:={0})(uSNChanged>={1})(uSNChanged<={2}))";

sidsForeign = GetUsersSidsByQuery(groupName, 

string.Format(queryForeignSecurityPrincipal, groupPrincipal.DistinguishedName, 0, 0));

public IList<SecurityIdentifier> GetUsersSidsByQuery(string groupName, string query)
        {


     List<SecurityIdentifier> results = new List<SecurityIdentifier>();
        try{
            using (var context = new PrincipalContext(ContextType.Domain, DomainName, User, Password))
            {

                using (var groupPrincipal = GroupPrincipal.FindByIdentity(context, IdentityType.SamAccountName,
                                                                          groupName))
                {
                    DirectoryEntry directoryEntry = (DirectoryEntry)groupPrincipal.GetUnderlyingObject();
                    do
                    {
                        directoryEntry = directoryEntry.Parent;
                    }
                    while (directoryEntry.SchemaClassName != "domainDNS");

                    DirectorySearcher searcher = new DirectorySearcher(directoryEntry){
                        SearchScope=System.DirectoryServices.SearchScope.Subtree,
                        Filter=query,
                        PageSize=10000,
                        SizeLimit = 15000
                    };

                    searcher.PropertiesToLoad.Add("objectSid");
                    searcher.PropertiesToLoad.Add("distinguishedname");
                    using (SearchResultCollection result = searcher.FindAll())
                    {
                        foreach (var obj in result)
                        {
                            if (obj != null)
                            {
                                var valueProp = ((SearchResult)obj).Properties["objectSid"];
                                foreach (var atributeValue in valueProp)
                                {
                                    SecurityIdentifier value = (new SecurityIdentifier((byte[])atributeValue, 0));
                                    results.Add(value);
                                }
                            }
                        }
                    }
                }
            }

        }
        catch (Exception e)
        {
            WriteSystemError(e);
        }
        return results;
    }

I tested it on usual users with query: "(&(objectClass=user)(memberof:1.2.840.113556.1.4.1941:={0})(uSNChanged>={1})(uSNChanged<={2}))" and it is work, I test with objectClass=* ... nothing help... But If I call groupPrincipal.GetMembers,I get all foreing user account from group. BUT groupPrincipal.GetMembers HAS MEMORY LEAK. Any Idea how to fix my query????