Can common routers create guest network in bridge mode?

[Avenged110]

So I've been using AirPorts for almost 10 years now, so I'm not up to date with features and whatnot of other current routers on the market. My network is pretty much:
1) Gateway - IP passthrough enabled
2) AirPort Extreme - handles DHCP and NAT, no wireless
3) Gigabit switch
4) AirPort Time Capsule - handles wireless (in bridge mode, obviously)
Apparently (and according to Apple's documentation), I'm not allowed to set up a guest network on the TC since it's in bridge mode. Now, I'm not at all a network engineer, but that sounds pretty lame. Does anyone know if common routers out there today that are roughly on-par with the latest AirPorts can handle this feature, or if I've missed an obvious workaround? Thanks.

Just ftr, I tried enabling a guest network anyway (which presents no warnings, mind you) and no clients can connect to it. So there's that.

 

[KGB7]

Take look at the list of routers that can run Tomatoe firmware. List will be on their site.

https://advancedtomato.com/

From personal experience, Asus routers are a great choice.

 

[Avenged110]

Take a list of routers that can run Tomatoe firmware. List will be on their site.

https://advancedtomato.com/

From personal experience, Asus routers are a great choice.

I'll look into it, thanks! That looks very fun (and very time consuming).