With the focus limiter, can't you set both the beginning and end point to the same ... say 2 meters? Why wouldn't that solve your issue?
http://fujifilm-dsc.com/en/manual/x-pro3/menu_shooting/af_mf_setting/index.html#af_range_limitter
Yeah, I've tried the focus limiter.
The challenge is this - I'll go out for some night street photography, with a zone focus at F5.6 and a zone focus of ~ 1.5 meters to 3 meters or so. Take some shots, just walking around.
Then I see something maybe 5 meters way I want to focus on, so I stop down to F2.0, hit the back button focus with the center point on it, recompose and take the shot.
Then I adjust back to F5.6 and a zone of 1.5 meters to 3 meters. Take some more shots.
Then someone/something interesting happens right in front of me, just 1 meter to 1.5 meters away. I live in Tokyo and on crowded streets this happens all the time.
With the Ricoh GRIII, I just switch to U1, where I have a custom setting saved at a zone focus of 0.7 meters - 1.5 meters.
With the M10-P, I just turn the focus tab so it's pointing straight down.
With the X100V, I miss the shot. Well, I get the shot, but the subjects are blurry from being too close.
I tried using the focus limiter set at 1 meter, so I could jam the autofocus button to focus down when I needed to do this. But then I lost the ability to use center point autofocus for those times I wanted to precisely set focus on a subject.
And apart from that, every time I did something then readjusted my focus zone to my default 1.5 meters to 3 meters, which happens all the time, ugh having to stop, look at the screen, turn that mushy focus dial, overshoot just a little bit and have to twiddle to make sure the zone is correct, ugh ugh ugh. Compare that to turning a m-mount lens... or just switching from U1 to U2 or U3 on the GRIII...