Sometimes you spend money on a client and plan on them reimbursing you for it. Here's how to track that in LessAccounting:
Tag that expense with your client's name, and maybe "unpaid" or "reimbursable."
When you need to find out what your client needs to reimburse you for, filter your Accounts Payables report by those tags. If you need to, you can manually add these to an invoice.
Once an expense is reimbursed, remove the "unpaid" tag and replace it with "paid" or "reimbursed"