“Time” also has a date component to it (it’s actually a Date/Time column even if you format it to only show the time).
The best thing to do is to convert your time to a number (I.e. 10:00AM becomes 10.00; 2:00PM becomes 14.00), then use greater than or less than conditions to perform the filtering.
If it’s time only then I think you can use two math columns to derive the hours from that time column and the now value to do a less than/greater than filter.
I don’t have any further recommendations aside from reading what Mark wrote in the thread Darren linked above. Let us know if you need any further help.