With the private or IP ranges, yes. To whitelist 192.168.0.0/24 you can simply put 192.168 and it will automatically temp allow anything in that /24 range. With the 10.0.0.0/8 range, you can simply put 10 and it will automatically temp allow anything in that /8 range. However, with other types of domain "names" no, you cannot wildcard it that way. Although for local domain servers, you can whitelist localhost mysite or whatever its called but make sure you also include 127.0.0.1 loopback address to prevent any aliasing issues.
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