Query Reports in V4

[lxnow]

I want to have a query report written that is accounts receivable related. It is specific to how we use ERPNext and I believe it can be done by a query report. Essentially it is similar to the current standard AR query report with the following additions:

• certain fields (standard and custom) are looked up from JV and Sales Invoices and will be shown in the report
• certain fields will need to be combined into one field for presentation purposes
  
• the A/R report can be filtered or generated by CUSTOMER GROUP

I have the following questions about it:

• Is this something that can be added by WebNotes for hosted accounts? (as this was done before)
  
• In Version 4, will this type of query report be restrictable by user and/or role?