In Tally you can raise quotes, invoices, receipts in currencies other than your home currency, this can be enabled in Settings > Currencies.  However Tally cannot handle payments in any other currency other than your home currency.

For example: in the Bank area you cannot have Lloyds TSB bank account in £’s and American Express in $’s.

We're working hard to introduce multi currency bank accounts and hope to have that launched as a feature shortly.