Yes, LogViewPlus supports the TAI64N date format as well as other variants of TAI dates. You will need to force identification of the date by specifying the format with: %d{TAI}
For example, if your log line looks like:
4000000056d4a439 my message
You can parse this by using a Pattern Parser with the format:
%d{TAI} %m%n
Variants of TAI are determined automatically. All TAI dates are parsed with the same %d{TAI} override.
Hope that helps,
Toby