[strongSwan] How to set local_ts to exclude one special ip in a subnet?

[nfel]

I have read the wiki about swanctl.conf, but have not found a good solution.
e.g. I have a subnet 172.22.0.0/16, and a special ip 172.22.22.22 who does not want to run into ipsec tunnel.
Does StrongSwan support '-'?
like this:
local_ts = 172.22.0.1-172.22.22.21,172.22.22.23-172.22.255.255
Is there any easy way?

Thx~

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