A method for associating a web event with a member of a group of users is implemented at a first computing device. The method includes: receiving a data access request from a second computing device; determining whether the second computing device provides a user login service; if so, causing the second computing device to render the user login service so that the user can provide an instruction of whether or not to associate the data access request with the user of the second computing device; if not, identifying a third computing device that is physically proximate the second computing device; and causing the third computing device to output an alert signal prompting the user of the second computing device to respond; and in response to the user's response through the third computing device, generating a data record to associate the data access request with the user of the second computing device.