No, this is not currently possible. According to the docs, the following syntax is supported:
['www.example.com'] # Fully qualified domain
['.example.com'] # Subdomain wildcard, matches example.com and www.example.com
['*'] # Matches anything
If you look at the implementation of the validate_host method, you can see that using '*' by itself is allowed, but using * as a wildcard as part of a string (e.g. '172.17.*.*') is not supported.