This is the same query with account filter added. You just need to choose the account from the account drop down and run the below query.
SELECT accountdefinition.org_name "Account",
wo.WORKORDERID "Request ID",
(aau.FIRST_NAME) "Requester",
(wo.TITLE) "Subject",
(ti.FIRST_NAME) "Technician",
longtodate(wo.CREATEDTIME) "Created Time",
longtodate(c.createdtime)"Conversation CreatedOn",
c.title "Conversation title",
longtodate(n.notificationdate)"Technician reply CreatedOn",
c.first_name "conversation by",
c.description "conversation Description",
n.notificationtitle "NOtification title",
n.description "Notification Description",
n.first_name "Sender name" FROM WorkOrder wo
LEFT JOIN SDUser sdu ON wo.REQUESTERID=sdu.USERID
LEFT JOIN AaaUser aau ON sdu.USERID=aau.USER_ID
LEFT JOIN WorkOrderStates wos ON wo.WORKORDERID=wos.WORKORDERID
LEFT JOIN SDUser td ON wos.OWNERID=td.USERID
LEFT JOIN AaaUser ti ON td.USERID=ti.USER_ID
LEFT JOIN StatusDefinition std ON wos.STATUSID=std.STATUSID
left join accountsitemapping asm ON wo.siteid=asm.siteid
left join accountdefinition ON accountdefinition.org_id=asm.accountid
LEFT JOIN
(SELECT con.workorderid,
con.title,
con.createdtime,
au1.first_name,
cond.description
FROM conversation con
LEFT JOIN aaauser au1 ON con.requesterid=au1.user_id
LEFT JOIN conversationdescription cond ON con.CONVERSATIONID= cond.CONVERSATIONID) c ON c.workorderid=wo.workorderid
LEFT JOIN
(SELECT nw.workorderid,
no.notificationtitle,
no.notificationdate,
au2.first_name,
nod.description
FROM notify_workorder nw
LEFT JOIN notification NO ON nw.notificationid=no.notificationid
LEFT JOIN aaauser au2 ON no.senderid=au2.user_id
LEFT JOIN notificationtodesc nod ON no.NOTIFICATIONID=nod.NOTIFICATIONID
WHERE no.senderid !=1) n ON n.workorderid=wo.workorderid
WHERE wo.CREATEDTIME >= <from_thisweek> and wo.createdtime <= <to_thisweek>
AND accountdefinition.org_id in ($Account)