Hi Gurdip - there have been a few questions like this over the years, here's one where I suggested a simple solution to receiving rents, deducting commissions and paying landlords:
https://secure.clearbooks.co.uk/community/questions/9043/client-s-money
If you wanted the ability to send statements, per letting then you'd merely set up a dummy letting "bank" account per letting.
A more sophisticated solution, where you wanted to send rent demands to tenants would be to create the tenant as a customer and issue them with invoices but putting the "income" to a creditor account, as money owed to the Landlord.
You'd then have the Landlord as a supplier and generate bills from them with two lines, one for the gross rent (put to the same creditor account) and a negative sum for your commission going to your commission income account.
In this way the tenant (customer) and landlord (supplier) could be given access to their statements directly on the website, or PDFs.
Hope that helps