Wildcards are supported and can be used when adding IP addresses to the approved or blocked list.
For example, the entry "http://61.220*" gives the following result in the TMProxy.log:
<TmpeURLf> Scan URL: "http://61.220.XXX.XX/" - UrlFilterEngine.cpp(228)
<TmpeURLf> Approved list matched - UrlFilterEngine.cpp(277)