Query Expression with Link entity inner join on 2 columns

Hello All, 

i want to achieve the below using query expression link entity 

"Select * FROM icms_icmssubjectmatrixmapping A INNER JOIN ava_subjectmatrix B ON

A.icms_subcategory= B.ava_subjectmatrix_subjectname AND

A.icms_category= B.ava_subjectmatrix_categoryname"

my code below has to check another and condition on join 

string subjectmatrixid = string.Empty;
bool ismappedcategory = true;
// CrmServiceAdapter OrgService=new CrmServiceAdapter();
SchemaMappingController mappingController = new SchemaMappingController();
QueryExpression queryExpression = new QueryExpression("icms_icmssubjectmatrixmapping");
queryExpression.LinkEntities.Add(new LinkEntity("icms_icmssubjectmatrixmapping", "ava_subjectmatrix", "icms_subcategory", "ava_subjectmatrix_subjectname", JoinOperator.Inner));
queryExpression.LinkEntities[0].EntityAlias = "Link";

queryExpression.Criteria.Conditions.Add(new ConditionExpression("icms_msoswitchboardcategory", ConditionOperator.Equal, (object)"Animal Issues"));
queryExpression.Criteria.Conditions.Add(new ConditionExpression("icms_msoswitchboardsubcategory", ConditionOperator.Equal, (object)"Animal Cruelty/Welfare"));
queryExpression.Criteria.Conditions.Add(new ConditionExpression("icms_ismappedcategory", ConditionOperator.Equal, (object)ismappedcategory));

 //queryExpression.LinkEntities[0].LinkCriteria.AddCondition("ava_subjectmatrix_categoryname", ConditionOperator.Equal, icms_category);

queryExpression.LinkEntities[0].Columns = new ColumnSet("ava_subjectmatrixid", "ava_subjectmatrix_subject");
EntityCollection entitiesJS1 = CrmServiceAdapter.OrgService.RetrieveMultiple(queryExpression);

how to achive this with CRM query expression

please help