I have CSS326-24G-2S+ - is there a way to do MAC-based VLAN? For example put a simple (not smart VLAN) device and based on its MAC switch to put the device on given VLAN as access port?

Did you solve the problem? I need mac based vlan too and I can't do it on CRS326 (neither on routeros, nor on swos). I can create mac based vlans on CRS125 and CRS226...

Not seeing anything that tells about the MAC-Based VLAN feature on the chip features page
https://wiki.mikrotik.com/wiki/Manual:S ... p_Features
CRS3xx appears to be different enough that it deserved it's own page, but also doesn't mention anything about mac based vlans
https://wiki.mikrotik.com/wiki/Manual:C ... s_switches
The only page that does mention examples of mac based vlans
https://wiki.mikrotik.com/wiki/Manual:C ... Based_VLAN

It states at the top of that page: Sad to say I don't think it's supported on CRS3xx series, but that's just my best guess from the material I mentioned.

I think so too and I think this is a serious problem for Mikrotik switches. Another problem I have to solve with CRS3XX is the blocking of rogue DHCP servers that with the CRS1XX and CRS2XX was simple and now I think is no more possible...