Don't quite understand your reply. Are you suggesting the creation of an additional segment into an existing CoA? If so, you may wish to correct this. Based on the post, the user appears to be an existing Oracle Project's user and therefore a CoA segment containing a project number (with ID) is not required.
he way I reconcile Projects to GL is to write a SQL query using the link between the journal lines table (gl_je_lines) and the cost distribution lines table (pa_cost_distribution_lines). The batch name in the cost dist. table equals reference_1 in the journal lines table. I also link the ccid in the journal lines table to the dr_code_combination_id (for the debit side)in the cost dist. table. This gives me the project, task, expenditure type detail for each journal line in a given journal entry.