You can use match tunnel-group in MPF on ASA.
Please refer to configuration guide:
Sorry to the late reply.
My question is like, set a maximum number of traffic a IPsec user can use from the tunnel. For instance, 10 G a week.
I didnt find your document has a relavent part to it. Correct me if I am wrong.
I don't see myself possibility to do that.
You can limit data transferred in one IPSEC SPI before renegotiation using
crypto ipsec security-association
but this is not what you are looking for.
I guess if you really want to achieve it you would need to use some external script going to ASA periodically through SSH and parsing output of some show commands.