Problem: I would like to show a custom search View for Users, where my site visitors could filter or search by User name or email.
Solution: Custom search filters are only supported in Views that display posts of some kind, so the best workaround for a custom search View of Users is to instead create a proxy post type and store your custom field information in that post type. The process is described in detail in the following documentation.
This is the technical support forum for Toolset - a suite of plugins for developing WordPress sites without writing PHP.
Everyone can read this forum, but only Toolset clients can post in it. Toolset support works 6 days per week, 19 hours per day.