Filter function for less +F

Question

When watching a growing log file with e.g. "less -iS +F service.log" I want to limit the display to lines matching a certain pattern.

I tried something like

less +F service.log | grep <pattern> | less +F

which doesn't work. Also

cat < service.log | grep <pattern> | less +F

doesn't do what I want. It looks like the input is already closed and less doesn't show changes.

How can I limit the display to lines matching a certain pattern?

Answer 1

tail -f service.log | grep <pattern>

Answer 2

The solution seemed simply

LESSOPEN='|grep <pattern> %s' less +F service.log

but less doesn't continue to read new lines from the growing log file.