Hi,
UPS and USPS plugins have been develop by external people who share their code with the community.
Theses plugins does not support rules like the manual shipping plugin does.
I am afraid that the present solution would be to modify the UPS plugin in order to but new rules into.
Best way would be to duplicate the plugin in order to have an another plugin name (so it would be possible to update HikaShop without loosing modifications).
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.