Is it possible to create a group and select the condition the lead source?

The goal: we receive the leads and assign the lead source. Then, we qualify and convert that lead to an account.

Once converted to an account, can I single out (If I create a query and select lead source for as query, group) the accounts / contacts that were generated by a certain lead source? If i create a query and try to use the leadsourceID, doesnt work, neither the description...

any suggestions? 

Account Level

Create a join from Account.Leadsourceid to LeadSource.Leadsourceid (Inner Join)

Highlight the LeadSource table and use the Description Field.

Contact Level

The join will already exist, expand ContactLeadsource -> Leadsource

Regards, Adam Travers