No, you cannot. You can make scenes with specific brightness levels.
If you have ZigBee or Zwave devices you mostly can create groups within the gateway and those groups will create a kind of group device in Domoticz (by the gateway) that can control brightness and colors.
Domoticz running on Udoo X86 (on Ubuntu)
Devices/plugins: ZigbeeforDomoticz (with Xiaomi, Ikea, Tuya devices), Nefit Easy, Midea Airco, Omnik Solar, Goodwe Solar