Petty Cash Expense how to handle

Summary

Petty Cash Expense how to handle

Content

Employees handles petty cash expenses for Company.  Business would like to give advance to Petty cash Advances.

Employee submits Petty cash advance 1000

Employee Submits Travel advance 2000

I would like to apply Petty cash expense to only petty cash advanced and Employee trip expenses to Travel advanced. 

If I create any reimbursement, system automatically apply advances based on due date.

Is it possible to control & apply the advances based on Reimbursement category.  

This gap is creating lot of problem to maintain Petty cash account & employee advances.

How to overcome this gap or suggest any workaround.